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add M27256 to docs
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@ -41,10 +41,10 @@ PromDevice28C prom(32 * 1024L, 64, 10, true);
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#elif defined(PROM_IS_27)
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#elif defined(PROM_IS_27)
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// Define a device for a 2764 EPROM with the following parameters:
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// Define a device for a 2764 EPROM with the following parameters:
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// 8K byte device capacity
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// 8K byte device capacity
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// PGM pin pulses active LOW
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// Program using dedicated WR pin
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// 1000us (1ms) write pulse
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// 1000us (1ms) write pulse
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// 15 write attempts
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// Max 15 write attempts
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// 4x overwrite pulse
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// 4x overwrite pulse (4 * writePulseLength * numberOfPulsesWritten)
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// (true) verify data byte after writing
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// (true) verify data byte after writing
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//PromDevice27 prom(8 * 1024L, E27C_PGM_WE, 1000L, 15, 4); // 2764 with SEEQ intelligent programming
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//PromDevice27 prom(8 * 1024L, E27C_PGM_WE, 1000L, 15, 4); // 2764 with SEEQ intelligent programming
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//PromDevice27 prom(32 * 1024L, E27C_PGM_WE, 1000L, 25, 3); // 27C256 with SEEQ intelligent programming
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//PromDevice27 prom(32 * 1024L, E27C_PGM_WE, 1000L, 25, 3); // 27C256 with SEEQ intelligent programming
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@ -37,6 +37,7 @@ different chip technologies.
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|AT29C010 |Atmel |Flash |28C |Only with 128 byte or less sector size|
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|AT29C010 |Atmel |Flash |28C |Only with 128 byte or less sector size|
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|SST39SF040|Microchip |Flash |SST39SF|All SST39SF0x0 supported|
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|SST39SF040|Microchip |Flash |SST39SF|All SST39SF0x0 supported|
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|SST28SF040|SST |Flash |SST28SF|All SST28SF0x0 supported|
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|SST28SF040|SST |Flash |SST28SF|All SST28SF0x0 supported|
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|M27256 |ST Micro |EPROM |27 |VCC=6V, VPP=12.5V to pgm|
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|M27C256 |ST Micro |EPROM |27 |VCC=6.5V, VPP=12.75V to pgm|
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|M27C256 |ST Micro |EPROM |27 |VCC=6.5V, VPP=12.75V to pgm|
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|W27C257 |Winbond |EEPROM |27 |Continuous 12V or 14V for program/erase|
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|W27C257 |Winbond |EEPROM |27 |Continuous 12V or 14V for program/erase|
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|SST27SF020|SST |Flash |27 |12V continuous for pgm/erase|
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|SST27SF020|SST |Flash |27 |12V continuous for pgm/erase|
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@ -213,6 +214,10 @@ while the programming voltages are present.
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This chip can only be erased with UV light, so the erase command is not supported.
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This chip can only be erased with UV light, so the erase command is not supported.
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### M27256
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This is an older version of the M27C256. Pin connections are the same, but for programming Vcc=6V and Vpp=12.5V. The programming pulse width is 1ms instead of 100us, and the programming algorithm uses an overwrite pulse equal to 3ms * the number of program pulses written.
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### W27C257 and W27C512
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### W27C257 and W27C512
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The Winbond W27C257 and W27E257 appear to be identical 32Kx8 EEPROMs. The 27C version
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The Winbond W27C257 and W27E257 appear to be identical 32Kx8 EEPROMs. The 27C version
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@ -17,8 +17,8 @@
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(33 F.Adhes user hide)
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(33 F.Adhes user hide)
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(34 B.Paste user hide)
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(34 B.Paste user hide)
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(35 F.Paste user hide)
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(35 F.Paste user hide)
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(36 B.SilkS user)
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(36 B.SilkS user hide)
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(37 F.SilkS user)
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(37 F.SilkS user hide)
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(38 B.Mask user hide)
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(38 B.Mask user hide)
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(39 F.Mask user hide)
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(39 F.Mask user hide)
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(40 Dwgs.User user hide)
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(40 Dwgs.User user hide)
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@ -86,7 +86,7 @@
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(mirror false)
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(mirror false)
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(drillshape 0)
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(drillshape 0)
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(scaleselection 1)
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(scaleselection 1)
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(outputdirectory "./edge-card-32"))
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(outputdirectory "./edge-card-32v2"))
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)
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)
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(net 0 "")
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(net 0 "")
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