Intel 8XC196MC User Manual
8XC196MC, MD, MH USER’S MANUAL
16-18
CCR1, CCR0
no direct access
The chip configuration registers (CCRs) control wait states, powerdown mode, and internal memory
protection. These registers are loaded from the PCCBs during programming modes and from the CCBs
for normal operation.
protection. These registers are loaded from the PCCBs during programming modes and from the CCBs
for normal operation.
7
0
1
1
0
1
WDE
BW1
IRC2
0
7
0
LOC1
LOC0
IRC1
IRC0
ALE
WR
BW0
PD
Bit Mnemonic
Function
WDE
Watchdog Timer Enable
PCCB default is initially disabled (enabled the first time WDT is cleared).
BW1
Buswidth Control
PCCB default selects BUSWIDTH pin control.
IRC2
Internal Ready Control
PCCB default selects READY pin control.
LOC1:0
Security Bits
PCCB default selects no protection.
IRC1:0
Internal Ready Control
PCCB default selects READY pin control.
ALE
Select Address Valid Strobe Mode
PCCB default selects ALE.
WR
Select Write Strobe Mode
PCCB default selects WR# and BHE#.
BW0
Buswidth Control
PCCB default selects BUSWIDTH pin control.
PD
Powerdown Enable
PCCB default enables powerdown.
Figure 16-6. Chip Configuration Registers (CCRs)