MC68HC908JW32_09 Datasheet, PDF (178/232 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers

Input/Output (I/O) Ports
13.6 Port E
Port E is a 6-bit general-purpose bidirectional I/O port. PTE[3:2] are special-function pins that share with
the USB data pin D+ and D–. Four of the pins PTE[7:4] are shared with serial peripheral interface (SPI)
module.
13.6.1 Port E Data Register
The port E data register contains a data latch for each of the six port E pins.
Address: $0008
Bit 7
6
5
4
3
2
1
Bit 0
Read:
PTE7
Write:
PTE6
PTE5
PTE4
PTE3
PTE2
Reset:
Unaffected by reset
Alternative Function:
D–
D+
Additional Function:
high
high
current current
open drain open drain
Additional Function:
Optional
USB
pullup to
VREF33
Additional Function:
Optional
5 kΩ
pullup to
VDD
Optional
5 kΩ
pullup to
VDD
Additional Function:
External
Interrupt
Additional Function:
PS2CLK
Additional Function: SS
MISO
MOSI SPSCK
= Unimplemented
Figure 13-14. Port E Data Register (PTE)
MC68HC908JW32 Data Sheet, Rev. 6
178
Freescale Semiconductor