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ISB—Initial Internal Space Base Select
This field defines the initial value of the IMMR bits 0-15 and determines the base address of
the internal memory space. Make sure that the IMMR is not in the interrupt address space
(IIP).
00 = 0x00000000.
01 = 0x00F00000.
10 = 0xFF000000.
11 = 0xFFF00000.
DBGC—Debug Pins Configuration
This field configures the functionality of the following pins.
00 = IP_B[0:1]/IWP[0:1]/VFLS[0:1] functions as IP_B[0:1].
IP_B3/IWP2/VF2 functions as IP_B3.
IP_B4/LWP0/VF0 functions as IP_B4.
IP_B5/LWP1/VF1 functions as P_B5.
OP2/MODCK1/STS functions as OP2.
ALE_B/DSCK/AT1 functions as ALE_B.
IP_B2/AT2 functions as IP_B2.
IP_B6/DSDI/AT0 functions as IP_B6.
IP_B7/PTR/AT3 functions as IP_B7.
OP3/MODCK2/DSDO functions as OP3.
01 = IP_B[0:1]/IWP[0:1]/VFLS[0:1] functions as IWP[0:1].
IP_B3/IWP2/VF2 functions as IWP2.
IP_B4/LWP0/VF0 functions as LWP0.
IP_B5/LWP1/VF1 functions as LWP1.
OP2/MODCK1/STS functions as STS.
ALE_B/DSCK/AT1 functions as AT1.
IP_B2/AT2 functions as AT2.
IP_B6/DSDI/AT0 functions as AT0.
IP_B7/PTR/AT3 functions as AT3.
OP3/MODCK2/DSDO functions as OP3.
10 = Reserved.
11 = IP_B[0:1]/IWP[0:1]/VFLS[0:1] functions as VFLS[0:1].
IP_B3/IWP2/VF2 functions as VF2.
IP_B4/LWP0/VF0 functions as VF0.
IP_B5/LWP1/VF1 functions as VF1.
OP2/MODCK1/STS functions as STS.
ALE_B/DSCK/AT1 functions as AT1.
IP_B2/AT2 functions as AT2.
IP_B6/DSDI/AT0 functions as AT0.
IP_B7/PTR/AT3 functions as AT3.
OP3/MODCK2/DSDO functions as OP3.
MOTOROLA
MPC823e REFERENCE MANUAL
Reset
4-11
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