MC68HC908LD64 Datasheet, PDF (311/362 Pages) Freescale Semiconductor, Inc – Microcontrollers

19.7 Port E
Input/Output (I/O) Ports
Port E
Port E is an 8-bit special-function port that shares all of its pins with the
universal serial bus module. (See Section 14. Universal Serial Bus
Module (USB).)
19.7.1 Port E Data Register
The port E data register (PTE) 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: DMINUS4 DPLUS4 DMINUS3 DPLUS3 DMINUS2 DPLUS2 DMINUS1 DPLUS1
Figure 19-17. 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.
DPLUSx and DMINUSx — Downstream Pairs of USB HUB Data Pins
The DPLUSx and DMINUSx pins are the data pin pairs of the
universal serial bus HUB. When the USBDSxE bit in the port E control
register (PECR) is clear, the corresponding PTE/DPLUSx and
PTE/DMINUSx pins are available for general-purpose I/O. (See
19.7.3 Port E Options.).
MC68HC908LD64 — Rev. 3.0
Freescale Semiconductor
Input/Output (I/O) Ports
Data Sheet
311