Freescale Semiconductor MC68HC08KH12 - Manual (Page 201)

MC68HC(7)08KH12 — Rev. 1.1 Advance Information
Freescale Semiconductor 201
Figure 12-18. Port E Optical Coupling Interface
PTE0
PORT LOGIC
PTE0
OPTICAL
INTERFACE
OUTPUT
BUFFER
MUX
SELECT
PTE1
PORT LOGIC
PTE1
OPTICAL
INTERFACE
OUTPUT
BUFFER
X-VREF
OIEX (BIT0 OF $1C)
0
1
MUX
SELECT
0
1
INT
ERNAL DATA BUS
PTE2
PORT LOGIC
PTE2
OPTICAL
INTERFACE
OUTPUT
BUFFER
MUX
SELECT
PTE3
PORT LOGIC
PTE3
OPTICAL
INTERFACE
OUTPUT
BUFFER
Y-VREF
OIEY (BIT1 OF $1C)
0
1
MUX
SELECT
0
1