Freescale Semiconductor, Inc.
Pa ra lle l Inp ut/ Outp ut
7.4.8 PB6/ SDI Log ic
The PB6/SDI pin can be used as a simple I/O port pin or be controlled
by the SIOP serial interface as shown in Figure 7-11. The operations of
PB6/SDI pin are summarized in Table 7-3.
SERIAL DATA IN (SDI)
SERIAL ENABLE (SPE)
READ $0005
WRITE $0005
DATA DIRECTION
REGISTER B
BIT DDRB6
R
PORT B DATA
PB6
SDI
WRITE $0001
REGISTER
BIT PB6
READ $0001
WRITE $0011
PULLDOWN
PULLDOWN
REGISTER B
DEVICE
BIT PDIB6
R
RESET
MASK OPTION REGISTER ($1FF1)
Figure 7-11. PB6/SDI Pin I/O Circuit
General Release Specification
MC68HC705JJ7/MC68HC705JP7 — Rev. 3.0
Parallel Input/Output
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