HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 37

• 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

MCU Operation Sequence: The MCU operates in the sequence shown in figures 16 to 18. It is reset by
an asynchronous RESET input, regardless of its state.
The low-power mode operation sequence is shown in figure 18. With the IE flag cleared and an interrupt
flag set together with its interrupt mask cleared, if a STOP/SBY instruction is executed, the instruction is
cancelled (regarded as an NOP) and the following instruction is executed. Before executing a STOP/SBY
instruction, make sure all interrupt flags are cleared or all interrupts are masked.
Interrupt
strobe
Direct transfer
timing
(LSON = 0, DTON = 1)
Subactive mode
Figure 16 MCU Operating Sequence (Power On)
t
RC
T:
:
Interrupt frame length
Oscillation stabilization period
Figure 15 Direct Transfer Timing
STOP/SBY
execution
RESET = 1?
Reset MCU
Power on
Internal execution
time
T
Yes
No
Oscillation
stabilization
time
t
RC
MCU operation
cycle
HD404328 Series
Active mode
33