z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 318
z80189
Manufacturer Part Number
z80189
Description
Z80180, Z8s180, Z8l180 Mpu Operation
Manufacturer
ZiLOG Semiconductor
Datasheet
1.Z80189.pdf
(326 pages)
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302
UM005003-0703
Register
Interrupt Vector Low
Register
INT/TRAP Control
Register
Refresh Control Register:
Z8018x
Family MPU User Manual
Table 57.
IL
ITC
RCR
Mnemonics Address
Internal I/O Registers (Continued)
3
3
3
3
4
6
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
10 states
20
40
80
TRAP
REFE
R/W
R/W
R/W
IL7
0
0
1
TRAP
Refresh Enable
REFW
IL6
UF0
R/W
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
R/W
CYC1
R/W
0
0
0
Cycle select
—
INT Enable 2,1,0
ITE0
CYC0
R/W
R/W
—
0
0
0
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