MC68HC05JJ6 Datasheet, PDF (94/216 Pages) Freescale Semiconductor, Inc – General Release Specification Microcontrollers

Parallel Input/Output
7.4.8 PB6/SDI Logic
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.
READ $0005
SERIAL DATA IN (SDI)
SERIAL ENABLE (SPE)
WRITE $0005
DATA DIRECTION
REGISTER B
BIT DDRB6
R
WRITE $0001
READ $0001
WRITE $0011
RESET
PORT B DATA
REGISTER
BIT PB6
PULLDOWN
REGISTER B
R
BIT PDIB6
PULLDOWN INHIBIT
MASK OPTION
(ENABLE = 0)
Figure 7-11. PB6/SDI Pin I/O Circuit
PB6
SDI
100 µA
PULLDOWN
DEVICE
General Release Specification
94
MC68HC05JJ6/MC68HC05JP6 — Rev. 3.2
Parallel Input/Output
Freescale Semiconductor