HD4074329S Renesas Electronics America, HD4074329S Datasheet - Page 26

• 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
Interrupt Enable Flag (IE: $000, Bit 0): Controls the entire interrupt process. It is reset by the interrupt
processing and set by the RTNI instruction, as shown in table 4.
Table 4
0
1
External Interrupts (INT
External Interrupt Request Flags (IF0: $000, Bit 2; IF1: $001, Bit 0): Set at the rising or falling
edges of the INT
Table 5
0
1
IF0 is set at the falling edge of signals input to INT
input to INT
figure 9.
22
IE
IF0, IF1
Bit 3
0
1
1
. The INT
Interrupt Enable Flag
External Interrupt Request Flags
IMR
Interrupt Enabled/Disabled
Disabled
Enabled
Interrupt Request
No
Yes
0
Bit 2
and INT
Interrupt mode register (IMR): $010
0
1
0
1
3
1
interrupt edge is selected by the interrupt mode register (IMR: $010), as shown in
1
0
, INT
No detection
Falling-edge detection
Rising-edge detection
Double-edge detection
inputs, as shown in table 5.
ZCD Detection Edge
2
1
): Specified by port mode register A (PMRA: $004).
Figure 9 Interrupt Mode Register
1
0
Initial value: 0000, R/W: W
0
, and IF1 is set at the rising and falling edges of signals
INT detection edge selection
ZCD detection edge selection
Bit 1
1
0
1
IMR
Bit 0
0
1
0
1
No detection
Falling-edge detection
Rising-edge detection
Double-edge detection
INT Detection Edge
1