Adv ance informa t ion – Texas Instruments TMS320 User Manual
Page 59
Pin Nomenclature (TMS320E25)
TMS320E25
SPRS010B — MAY 1987 — REVISED NOVEMBER 1990
POST OFFICE BOX 1443
HOUSTON, TEXAS 77001
59
Figure 9 shows the wiring conversion to program the TMS320E25 using the 28-pin pinout of the TMS27C64.
The pin nomenclature table provides a description of the TMS27C64 pins. The code to be programmed into the
device should be serial mode. The TMS320E25 uses 13 address lines to address the 4K-word memory in byte
format.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
PGM
EPT
A8
A9
A11
G
A10
E
Q8
Q7
Q6
Q5
Q4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V
A12
A7
A6
A5
A4
A3
A2
A1
A0
Q1
Q2
Q3
GND
PP
TMS27C64
TMS320E25
68-Pin (FZ)
8
D7
D6
D5
D4
D3
D2
D1
D0
E
24
25
26
EPT
V
PP
A0
CLKIN
TMS27C64
V
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A1
1
A12
SS
PG
M
G
V
CC
3.9
K
RS
SIGNALS
I/O
DEFINITION
A12 (MSB)-A0 (LSB)
CLIN
E
EPT
G
GND
PGM
Q8 (MSB)-Q1 (LSB)
RS
V
CC
V
PP
I
I
I
I
I
I
I
I/O
I
I
I
On-chip EPROM programming address lines
Clock oscillator input
EPROM chip select
EPROM test mode select
EPROM read/verify select
Ground
EPROM write/program select
Data lines for byte-wide programming of on-chip 8K bytes of EPROM
Reset for initializing the device
5-V power supply
12.5-V power supply
Figure 9. TMS320E25 EPROM Conversion to TMS27C64 EPROM Pinout
ADV
ANCE
INFORMA
T
ION