MC68HC908LJ24 Datasheet, PDF (391/464 Pages) Motorola, Inc – Microcontrollers

Freescale Semiconductor, Inc.
Input/Output (I/O) Ports
Port D
SDA, SCL — Multi-Master IIC Data and Clock Pins
The SDA and SCL pins are multi-master IIC data and clock open-
drain pins, enabled by setting the MMEN bit in the MMIIC control
register (MMCR). Port pins used as MMIIC will override any control
from the port I/O logic. See Section 15. Multi-Master IIC Interface
(MMIIC).
T2CLK — TIM2 Clock Input Pin
The T2CLK pin is the external clock input for TIM2, enabled by setting
the prescaler select bits, PS[2:0] to %111, in the TIM2 status and
control register (T2SC). Port pin used as T2CLK will override any
control from the port I/O logic. See Section 11. Timer Interface
Module (TIM).
T1CLK — TIM1 Clock Input Pin
The T1CLK pin is the external clock input for TIM1, enabled by setting
the prescaler select bits, PS[2:0] to %111, in the TIM1 status and
control register (T1SC). Port pin used as T1CLK will override any
control from the port I/O logic. See Section 11. Timer Interface
Module (TIM).
SPSCK, MOSI, MISO, and SS — SPI Functional Pins
These four pins are the SPI clock, master-output-slave-input, master-
input-slave-output, and slave select pins; enabled by setting the SPI
enable bit, SPE, in the SPI control register (SPCR). Port pins used as
SPI will override any control from the port I/O logic. See Section 14.
Serial Peripheral Interface Module (SPI).
CALOUT, CALIN — RTC Calibration Pins
The CALOUT and CALIN pins are RTC calibration pins, enabled by
setting the CAL bit in the RTC calibration register (RTCCOMR). Port
pins used for RTC calibration will override any control from the port
I/O logic. See Section 12. Real Time Clock (RTC).
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Input/Output (I/O) Ports
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Data Sheet
391