Z8S180 Zilog., Z8S180 Datasheet - Page 318

• Manufacturer Part Number: Z8S180
• Description: ENHANCED Z180 MICROPROCESSOR
• Manufacturer: Zilog.

302
UM005001-ZMP0400
Register
Interrupt Vector Low
Register
INT/TRAP Control
Register
Refresh Control Register:
Z8018x Family
MPU User Manual
Table 57. Internal I/O Registers (Continued)
IL
ITC
RCR
Mnemonics Address
3
3
3
4
6
3
during RESET
during RESET
during RESET
0 0
0 1
1 0
1 1
R/W
R/W
R/W
bit
bit
bit
Interval of Refresh Cycle
20
40
80
10 states
TRAP
REFE
R/W
R/W
R/W
IL7
0
0
1
TRAP
Refresh Enable
REFW
IL6
R/W
UF0
Interrupt Vector Low
0
0
R
1
R/W
Unidentified Fetch Object
Refresh Wait State
Remarks
IL5
R/W
—
—
0
1
1
—
—
—
0
1
1
—
—
—
0
1
1
ITE2
R/W
—
—
0
0
1
ITE1
CYC1
R/W
R/W
Cycle select
—
0
0
0
INT Enable 2,1,0
ITE0
CYC0
R/W
R/W
—
0
0
0