MC68HC908BD48 Datasheet, PDF (247/290 Pages) Freescale Semiconductor, Inc – Microcontrollers

Input/Output (I/O) Ports
Port E
17.7 Port E
Port E is a 3-bit special-function port that shares all of its pins with the
sync processor.
NOTE: Port pin PTE0 is not available in a 28-pin dual in-line package.
17.7.1 Port E Data Register
The port E data register contains a data latch for each of the two port E
pins.
Address: $0008
Bit 7
6
Read: 0
0
Write:
Reset:
Alternate
Function:
5
4
3
2
1
Bit 0
0
0
0
PTE2 PTE1 PTE0
Unaffected by reset
VSYNCO HSYNCO
SOG or
TCH0
= Unimplemented
Figure 17-16. Port E Data Register (PTE)
PTE2 and PTE0 — Port E Data Bits
PTE2–PTE0 are read/write, software programmable bits. Data
direction of each port E pin is under the control of the corresponding
bit in data direction register E.
VSYNCO — Vsync Output
The PTE2/VSYNCO pin is the Vsync output from the sync processor.
When the VSYNCOE is clear, the PTE2/VSYNCO pin is available for
general-purpose I/O. See 17.7.3 Port E Options.
HSYNC — Hsync Output
The PTE1/HSYNCO pin is the Hsync output from the sync processor.
When the HSYNCOE is clear, the PTE1/HSYNCO pin is available for
general-purpose I/O. See 17.7.3 Port E Options.
MC68HC908BD48 — Rev. 1.0
MOTOROLA
Input/Output (I/O) Ports
Technical Data
247