lopes@aurora.misemi ( telebras) (06/04/90)
Hello Ray,
I'm sorry for this late response, but there are two reasons: I could not reach
you by EMail and, at the time I received your EMail, I did not have any data
to give you. Anyway, I received it today (A friend of mine has got it from TI
Brazil) and I'll mail it to you right now, with the same conversion table
below.
Best regards,
Chico.
================================================================================
TMS320E25 EPROM CONVERSION TO TMS27C64 EPROM PINOUT
================================================================================
TMS27C64 | TMS320E25
--------------------------------------------------------------------------------
pin number | signal name | pin number
--------------------------------------------------------------------------------
1 | Vpp | 25
--------------------------------------------------------------------------------
2 | A12 | 40
--------------------------------------------------------------------------------
3 | A7 | 34
--------------------------------------------------------------------------------
4 | A6 | 33
--------------------------------------------------------------------------------
5 | A5 | 33
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6 | A4 | 31
--------------------------------------------------------------------------------
7 | A3 | 30
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8 | A2 | 29
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9 | A1 | 28
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10 | A0 | 26 THROUGH INVERTER (SEE *)
--------------------------------------------------------------------------------
11 | Q1 | 18
--------------------------------------------------------------------------------
12 | Q2 | 17
--------------------------------------------------------------------------------
13 | Q3 | 16
--------------------------------------------------------------------------------
14 | GND | 10, 27, 44, 52 AND 65
--------------------------------------------------------------------------------
15 | Q4 | 15
--------------------------------------------------------------------------------
16 | Q5 | 14
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17 | Q6 | 13
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18 | Q7 | 12
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19 | Q8 | 11
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20 | /E | 22
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21 | A10 | 38
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22 | /G | 42
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23 | A11 | 39
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24 | A9 | 37 THROUGH RESISTOR 3.9 K (SEE **)
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25 | A8 | 36
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26 | EPT | 24
--------------------------------------------------------------------------------
27 | /PGM | 41
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28 | VCC | 35 AND 61
--------------------------------------------------------------------------------
* TMS27C64 pin 10 ----|>o----- pin 26 TMS320E25
____
** TMS27C64 pin 24 ----[____]---- pin 37 TMS320E25
3.9 K
TMS320E25 pins 1, 2, 3, 4, 5, 6, 7, 8, 9, 19, 20, 21, 23, 43, 45, 46, 47,
48, 49, 50, 51, 53, 54, 55, 56, 57, 58, 59, 60, 62, 63, 64,
66, 67 and 68 ----> unconnected
PIN NOMENCLATURE (TMS320E25):
-------------------------------------------------------------------
SIGNALS | I/O | DEFINITION
-------------------------------------------------------------------
A12(MSB) - A0(LSB) | I | On-chip EPROM programming address lines
-------------------------------------------------------------------
CLKIN | I | Clock oscillator input
-------------------------------------------------------------------
/E | I | EPROM chip select
-------------------------------------------------------------------
EPT | I | EPROM test mode select
-------------------------------------------------------------------
/G | I | EPROM read/verify select
-------------------------------------------------------------------
GND | I | Ground
-------------------------------------------------------------------
/PGM | I | EPROM write/program select
-------------------------------------------------------------------
Q8(MSB) - Q1(LSB) | I/O | Data lines for byte-wide programming of
| | on-chip 8K bytes of EPROM
-------------------------------------------------------------------
/RS | I | Reset for initializing the device
-------------------------------------------------------------------
VCC | I | 5 V power supply
-------------------------------------------------------------------
VPP | I | 12.5 V power supply
-------------------------------------------------------------------