Datasheet

Configuration Register (CONFIG)
Technical Data MC68HC908GR8 — Rev 4.0
130 Configuration Register (CONFIG) MOTOROLA
NOTE: To ensure correct operation of the MCU under all operating conditions,
the user must write data $1C to address $0033 immediately after reset.
This is to ensure proper termination of an unused module within the
MCU.
NOTE: On a FLASH device, the options except LVI5OR3 are one-time writeable
by the user after each reset. The LVI5OR3 bit is one-time writeable by
the user only after each POR (power-on reset). The CONFIG registers
are not in the FLASH memory but are special registers containing one-
time writeable latches after each reset. Upon a reset, the CONFIG
registers default to predetermined settings as shown in Figure 8-1 and
Figure 8-2.
Address: $001E
Bit 7654321Bit 0
Read: 000000OSC-
STOPEN
B
SCIBD-
SRC
Write:
Reset:00000000
= Unimplemented
Figure 8-1. Configuration Register 2 (CONFIG2)
Address: $001F
Bit 7654321Bit 0
Read:
COPRS LVISTOP LVIRSTD
LVIP-
WRD
LVI5OR3 SSREC STOP COPD
Write:
Reset:0000See Note000
Note: LVI5OR3 bit is only reset via POR (power-on reset)
Figure 8-2. Configuration Register 1 (CONFIG1)
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
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