mc68hc05pl4b Freescale Semiconductor, Inc, mc68hc05pl4b Datasheet - Page 47

• Manufacturer Part Number: mc68hc05pl4b
• Description: Low-cost Single-chip Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

7.3
7.4
7.5
MC68HC05PL4
REV 2.0
Port A
Port B
Port
PORT B
Port B is an 8-bit bidirectional port, with pins PB0-PB3 shared with keyboard inter-
rupt functions. The Port B Data Register is at address $0001 and the Data Direc-
tion Register is at address $0006.
Pins PB0 to PB3 keyboard interrupt functions have individual enable and ag bits
in registers $000B and $000C.
PORT C
Port C is an 8-bit bidirectional port. The Port C Data Register is at address $0002
and the Data Direction Register is at address $0007. Port pins PC0 to PC3 are
high current sink pins; see Electrical Speci cations section f or values.
SUMMARY OF PORT A AND PORT B SHARED PINS
Table 7-2 below shows a summary of port pins shared with other on-chip mod-
ules.
PB3-PB0
Port Pin
PA0
PA1
PA2
PA3
KBIE3-KBIE0
Table 7-2. Port A and Port B Shared Pins
PUL3-PUL0
Freescale Semiconductor, Inc.
TCMPEN
TCAPEN
Control
DACEN
For More Information On This Product,
—
Go to: www.freescale.com
INPUT/OUTPUT PORTS
PB3/KBI3-PB0/KBI0
April 30, 1998
PA0 or OSC2
PA3/TCMP
PA1/DTMF
PA2/TCAP
Pin Name
GENERAL RELEASE SPECIFICATION
16-bit Timer Output Compare
OSC2 on MC68HC05PL4B
16-bit Timer Input Capture
PA0 on MC68HC05PL4
Shared Functions
DAC DTMF Output
Keyboard Interrupt
7-3