HD6432646 Hitachi, HD6432646 Datasheet - Page 994

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

SYSCR—System Control Register
960
Bit
Initial value
Read/Write
MAC Saturation
0 Non-saturating calculation for MAC instruction
1 Saturating calculation for MAC instruction
MACS
R/W
Interrupt Control Mode 1 and 0
7
0
INTM1 INTM0
0
1
—
—
0
1
0
1
6
0
NMI Edge Select
0 An interrupt is requested at the falling edge of NMI input
1 An interrupt is requested at the rising edge of NMI input
Control Mode
INTM1
Interrupt
R/W
5
0
—
—
0
2
INTM0
R/W
4
0
Control of interrupts by I bit
Setting prohibited
Control of interrupts by I2 to I0 bits and IPR
Setting prohibited
NMIEG
H'FDE5
R/W
3
0
RAM Enable
0 On-chip RAM is disabled
1 On-chip RAM is enabled
Description
R/W
—
2
0
—
—
1
0
RAME
R/W
0
1
System