HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 73

• Manufacturer Part Number: HD4074329S
• Description: MCU 4-Bit HMCS400 CISC 20KB EPROM 3.3V/5V 64-Pin SDIP
• Manufacturer: Renesas Electronics America

Specifications of HD4074329S

• Package: 64SDIP
• Family Name: HMCS400
• Maximum Speed: 4.5 MHz
• Ram Size: 268 Byte
• Program Memory Size: 20 KB
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 4 Bit
• Program Memory Type: EPROM
• Number Of Programmable I/os: 35
• On-chip Adc: 4-chx8-bit
• Operating Temperature: -20 to 75 °C
• Number Of Timers: 3

PROM Mode Description
Programming the Built-In ROM
The MCU’s built-in ROM is programmed in PROM mode in which the pins are arranged as shown in
figure 42. PROM mode is set by pulling TEST, M
In PROM mode, the MCU does not operate, but it can be programmed in the same way as any other
commercial 27256-type EPROM using a standard PROM programmer and a 64-to-28–pin socket adapter.
Recommended PROM programmers and socket adapters are listed in table 35.
Since an HMCS400-series instruction is ten bits long, the HMCS400-series MCU has a built-in conversion
circuit to enable use of a general-purpose PROM programmer. This circuit splits each instruction into a
lower five bits and an upper five bits that are read from or written to consecutive addresses. This means
that if, for example, 16 kwords of built-in PROM are to be programmed by a general-purpose PROM
programmer, a 32-kbyte address space ($0000–$7FFF) must be specified.
RESET
TEST
GND
GND
GND
V
V
V
A
A
A
A
A
V
V
M
M
O
O
O
A
A
A
A
A
A
CC
CC
CC
CC
PP
10
11
12
13
14
0
1
7
8
0
9
5
6
4
3
2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
HD4074329S
HD4074329US
HD4074329C
Figure 42 Pin Arrangement in PROM Mode
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
OE
CE
A
A
A
A
O
O
O
O
O
O
O
O
V
O
O
V
CC
4
3
2
1
CC
7
6
5
4
3
2
1
0
0
1
Note:
RESET
TEST
Externally connect pins of the same name. This is not
necessary if one of the sockets listed in table 35 is used.
0
GND
GND
GND
, and M
V
V
V
A
A
A
A
A
CC
A
A
A
CC
CC
10
11
12
13
14
7
8
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
1
M
low, and RESET high as shown in figure 43.
64 63 62 61 60 59 58 57 56 55 54 53 52
20 21 22 23 24 25 26 27 28 29 30 31 32
A
0
9
V
M
PP
1
V
A
CC
5
A
6
HD4074329FS
HD4074329UFS
O
4
O
3
V
O
CC
2
O
HD404328 Series
1
O
0
V
CC
O
0
O
1
O
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
2
OE
CE
A
A
A
A
O
O
O
O
O
4
3
2
1
7
6
5
4
3
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