mc68hc05jp6pe Freescale Semiconductor, Inc, mc68hc05jp6pe Datasheet - Page 101

• Manufacturer Part Number: mc68hc05jp6pe
• Description: M68hc05 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

7.5.4 Port C Logic
MC68HC05JJ6/MC68HC05JP6
Freescale Semiconductor
WRITE $0002
WRITE $0010
WRITE $0006
RESET
READ $0006
READ $0002
Figure 7-15
When a port C pin is programmed as an output, reading the port bit
actually reads the value of the data latch and not the voltage on the pin
itself. When a port C pin is programmed as an input, reading the port bit
reads the voltage level on the pin. The data latch can always be written,
regardless of the state of its DDR bit.
operations of the port C pins.
R
R
—
PORT C DATA
REGISTER
Rev. 3.2
BIT PCx
DATA DIRECTION
REGISTER A
PULLDOWN
REGISTER C
BIT PDICx
Figure 7-15. Port C I/O Circuit
BIT DDRCx
shows the I/O logic of port C.
Parallel Input/Output
PULLDOWN INHIBIT
MASK OPTION
(ENABLE = 0)
Table 7-4
General Release Specification
summarizes the
Parallel Input/Output
5 mA SOURCE
100 A
PULLDOWN
DEVICE
15 mA SINK
CAPABILITY
PCx
101