MC68HC05B4 Datasheet, PDF (25/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

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1
INTRODUCTION
The MC68HC05B6 microcomputer (MCU) is a member of Motorola’s MC68HC05 family of
low-cost single chip microcomputers. This 8-bit MCU contains an on-chip oscillator, CPU, RAM,
ROM, EEPROM, A/D converter, pulse length modulated outputs, I/O, serial communications
interface, programmable timer system and watchdog. The fully static design allows operation at
frequencies down to dc to further reduce the already low power consumption to a few micro-amps.
This data sheet is structured such that devices similar to the MC68HC05B6 are described in a set
of appendices (see Table 1-1).
Table 1-1 Data sheet appendices
Device
MC68HC05B4
MC68HC05B8
MC68HC705B5
MC68HC05B16
MC68HC705B16
MC68HC705B16N
MC68HC05B32
MC68HC705B32
Appendix
Differences from MC68HC05B6
A 4K bytes ROM; no EEPROM
B 7.25K bytes ROM
C
6K bytes EPROM; self-check replaced by bootstrap
firmware; no EEPROM
D 16K bytes ROM; increased RAM and self-check ROM
E
16K bytes EPROM; increased RAM; self-check replaced
by bootstrap firmware; modified power-on reset routine
F
16K bytes EPROM; increased RAM; self-check replaced
by bootstrap firmware; modified power-on reset routine
G 32K bytes ROM; no page zero ROM; increased RAM
H
32K bytes EPROM; no page zero ROM; increased RAM;
self-check mode replaced by bootstrap firmware
MC68HC05B6
Rev. 4
INTRODUCTION
TPG
MOTOROLA
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