mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 394

• Manufacturer Part Number: mc68hc908lj24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Input/Output (I/O) Ports
18.7 Port E
18.7.1 Port E Data Register (PTE)
Data Sheet
394
Alternative Function:
Additional Function: LED drive LED drive LED drive LED drive LED drive LED drive LED drive LED drive
Address:
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.
The port E data register contains a data latch for each of the eight port E
pins.
PTE[7:0] — Port E Data Bits
FP[18:11] — LCD Driver Frontplanes 18–11
LED drive — Direct LED Drive Pins
Reset:
Read:
Write:
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] 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
Display (LCD)
PTE0–PTE7 pins can be configured for direct LED drive. See
Port E LED Control Register
$0008
PTE7
FP18
Bit 7
Figure 18-16. Port E Data Register (PTE)
Input/Output (I/O) Ports
PTE6
FP17
6
Driver.
PTE5
FP16
5
Unaffected by reset
PTE4
FP15
(LEDE).
4
PTE3
FP14
Section 17. Liquid Crystal
MC68HC908LJ24/LK24 — Rev. 2.1
3
PTE2
FP13
Freescale Semiconductor
2
PTE1
FP12
1
18.7.3
PTE0
FP11
Bit 0