Freescale Semiconductor, Inc.
April 30, 1998
GENERAL RELEASE SPECIFICATION
SECTION 1
GENERAL DESCRIPTION
The MC68HC05PL4 HCMOS microcontroller is a member of the M68HC05 Fam-
ily of low-cost single-chip microcontroller units (MCUs). This MCU is designed
speci cally for the handset and base set of cost-sensitive CT0/1 analog cordless
phones.
References to MC68HC05PL4 apply to both MC68HC05PL4 and
MC68HC05PL4B, unless otherwise stated.
Table 1-1. MC68HC05PL4 and MC68HC05PL4B Differences
Device
MC68HC05PL4
MC68HC05PL4B
Pin 27
PA0
OSC2
1.1
FEATURES
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Industry standard 8-bit M68HC05 CPU core
Bus frequency: 2.56MHz @ 4V and 1MHz @ 2V
Built-in low-frequency RC oscillator (500kHz and 20kHz)
OSC input pin (OSC output pin on MC68HC05PL4B)
256 bytes of user RAM
4k-bytes of user ROM
ROM security
23 (22 for MC68HC05PL4B) bidirectional I/O lines with:
– 4 keyboard interrupts with pull-up resistor
– 6 high current sink pins
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Open-drain output for LED drive
Multiplexed DTMF output with built-in 6-bit D/A
16-bit programmable timer with input capture and output compare
functions
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Reloadable 8-bit event timer
COP watchdog reset
Power saving STOP and WAIT modes
Available in 28-pin PDIP, SOIC, and SSOP packages
MC68HC05PL4
REV 2.0
GENERAL DESCRIPTION
1-1
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