MC68HC908LJ24 Datasheet, PDF (394/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Input/Output (I/O) Ports
18.7 Port E
Port E is an 8-bit special function port that shares all of its port pins with
the liquid crystal display (LCD) driver module.
Port pins PTE0–PTE7 can be configured for direct LED drive.
18.7.1 Port E Data Register (PTE)
The port E data register contains a data latch for each of the eight port E
pins.
Address: $0008
Bit 7
6
5
4
3
2
1
Bit 0
Read:
PTE7
Write:
PTE6
PTE5
PTE4
PTE3
PTE2
PTE1
PTE0
Reset:
Unaffected by reset
Alternative Function: FP18 FP17 FP16 FP15 FP14 FP13 FP12 FP11
Additional Function: LED drive LED drive LED drive LED drive LED drive LED drive LED drive LED drive
Figure 18-16. Port E Data Register (PTE)
PTE[7:0] — Port E Data Bits
These read/write bits are software programmable. Data direction of
each port E pin is under the control of the corresponding bit in data
direction register E. Reset has no effect on port E data.
FP[18:11] — LCD Driver Frontplanes 18–11
FP[18:11] are pins used for the frontplane output of the LCD driver
module. The enable bit, PEE, in the CONFIG2 register, determines
whether the PTE7/FP18–PTE0/FP11 pins are LCD frontplane driver
pins or general-purpose I/O pins. See Section 17. Liquid Crystal
Display (LCD) Driver.
LED drive — Direct LED Drive Pins
PTE0–PTE7 pins can be configured for direct LED drive. See 18.7.3
Port E LED Control Register (LEDE).
Data Sheet
394
MC68HC908LJ24/LK24 — Rev. 2
Input/Output (I/O) Ports
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