HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 59

• 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

HD404328 Series
Transmission
completion (IFS
1)
Interrupts inhibited
IFS
0
SMR write
Yes
Transmit clock
IFS = 1?
error processing
No
Normal termination
Figure 33 Transmit Clock Error Detection
Note on Use: The serial interrupt request flag might not be set if the status is changed from transfer by the
execution of an SMR write or STS instruction during the first period that the transmit clock is low. To
prevent this, program a check that the SCK pin is at 1 (by executing an input instruction for the R1 port)
before the execution of an SMR write or STS instruction, to ensure that the serial interrupt request flag is
set.
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