Intel 8XC196MC, 8XC196MD manual CCR1, CCR0, LOC1 LOC0 IRC1 IRC0 WDE BW1 IRC2, Bit Mnemonic Function

Models: 8XC196MD 8XC196MH 8XC196MC

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8XC196MC, MD, MH USER’S MANUAL

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.

7

1

1

0

1

 

 

 

 

7

LOC1

LOC0

IRC1

IRC0

 

 

 

 

0

WDE

BW1

IRC2

0

 

 

 

0

 

 

 

 

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)

16-18

Page 371
Image 371
Intel 8XC196MC, 8XC196MD, 8XC196MH manual CCR1, CCR0, LOC1 LOC0 IRC1 IRC0 WDE BW1 IRC2, Bit Mnemonic Function