HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 17

no-image

HD4074329S

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

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
Functional Description
Registers and Flags
The MCU has nine registers and two flags for CPU operations. They are shown in figure 5 and described
below.
Accumulator (A), B Register (B): Four-bit registers used to hold results from the arithmetic logic unit
(ALU) and transfer data between memory, I/O, and other registers.
Accumulator
B register
W register
X register
Y register
SPX register
SPY register
Carry
Status
Program counter
Initial value: 0,
no R/W
Stack pointer
Initial value: $3FF, no R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: Undefined, R/W
Initial value: 1, no R/W
13
Figure 5 Registers and Flags
9
1
1
(PC)
1
1
5
3
3
3
3
3
3
(SP)
HD404328 Series
(SPX)
(SPY)
(A)
(Y)
(B)
(X)
1
(W)
(CA)
(ST)
0
0
0
0
0
0
0
0
0
0
0
13

Related parts for HD4074329S