Intel 8XC196NT User Manual page 381

8XC196NT USER'S MANUAL
CCR2, CCR1, CCR0
The chip configuration registers (CCRs) control OTPROM mapping, addressing mode, bus configu-
ration, 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.
7
— —
7
MSEL1 MSEL0
7
LOC1 LOC0
Bit Mnemonic
REMAP
MODE16
MSEL1:0
WDE
BW1
IRC2
LDCCB2
LOC1:0
IRC1:0
ALE
WR
BW0
PD
Figure 15-6. Chip Configuration Registers (CCRs)
15-18
— —
— —
IRC1 IRC0
OTPROM remapping. No effect in programming modes.
Addressing mode. PCCB default is 16-bit addressing.
External Access Timing Mode Select
PCCB default is standard mode.
Watchdog Timer Enable
PCCB default is initially disabled (enabled the first time WDT is cleared).
Buswidth Control
PCCB default selects BUSWIDTH pin control.
Internal Ready Control.
PCCB default selects READY pin control.
Load CCB2. PCCB default loads CCB2.
Security Bits
PCCB default selects no protection.
Internal Ready Control
PCCB default selects READY pin control.
Select Address Valid Strobe Mode.
PCCB default selects ALE.
Select Write Strobe Mode.
PCCB default selects WR# and BHE#.
Buswidth Control
PCCB default selects BUSWIDTH pin control.
Powerdown Enable.
PCCB default enables powerdown.
Address: FF201CH, FF201AH, FF2018H
Reset State: from CCBs XXH, XXH, XXH
Reset State:
— REMAP MODE16
WDE BW1
ALE WR
Function
see bit descriptions
0
—
0
IRC2 LDCCB2
0
BW0 PD