MC68HC908LJ12 Datasheet, PDF (75/413 Pages) Freescale Semiconductor, Inc – 8-bit microcontroller units

Configuration Registers (CONFIG)
PCEH — Port C Enable High Nibble
Setting PCEH configures the PTC4/FP23–PTC7/FP26 pins for LCD
frontplane driver use. Reset clears this bit.
1 = PTC4/FP23–PTC7/FP26 pins configured as LCD frontplane
driver pins: FP23–FP26
0 = PTC4/FP23–PTC7/FP26 pins configured as standard I/O pins:
PTC4–PTC7
PCEL — Port C Enable Low Nibble
Setting PCEL configures the PTC0/FP19–PTC3/FP22 pins for LCD
frontplane driver use. Reset clears this bit.
1 = PTC0/FP19–PTC3/FP22 pins configured as LCD frontplane
driver pins: FP19–FP22
0 = PTC0/FP19–PTC3/FP22 pins configured as standard I/O pins:
PTC0–PTC3
LVISEL[1:0] — LVI Operating Mode Selection
LVISEL[1:0] selects the voltage operating mode of the LVI module.
(See Section 21. Low-Voltage Inhibit (LVI).) The voltage mode
selected for the LVI should match the operating V_DD. See Section 23.
Electrical Specifications for the LVI voltage trip points for each of
the modes.
LVISEL1
LVISEL0
Operating Mode
0
0
Reserved (2.5V)
0
1
3V
1
0
5V
1
1
Reserved
Table 5-1. LVI Trip Point Selection
Technical Data
76
Configuration Registers (CONFIG)
MC68HC908LJ12 — Rev. 2.1
Freescale Semiconductor