Zilog Z80180 Manual de usuario Pagina 318

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Z8018x
Family MPU User Manual
302
UM005003-0703
Interrupt Vector Low
Register
INT/TRAP Control
Register
Refresh Control Register:
IL
ITC
RCR
33
34
36
Table 57. Internal I/O Registers (Continued)
Register Mnemonics Address Remarks
R/W R/W R/W
00 00000
IL7
IL6 IL5
0
bit
during RESET
R/W
Interrupt Vector Low
R/W
R
R/W
00 11000
TRAP UF0
1
bit
during RESET
R/W
Unidentified Fetch Object
ITE2 ITE1 ITE0
R/W R/W
INT
Enable 2,1,0
TRAP
R/W
R/W
11 11100
REFE
REFW
——
1
bit
during RESET
R/W
Refresh Wait State
CYC1 CYC0
R/W R/W
Cycle select
Refresh Enable
0 0
10 states
20
0 1
1 0
1 1
Interval of Refresh Cycle
40
80
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