MC68HC05B4 Datasheet, PDF (151/298 Pages) Motorola, Inc – High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit

A
MC68HC05B4
The MC68HC05B4 is a device similar to the MC68HC05B6, but without EEPROM and having a
reduced ROM size of 4 kbytes. The entire MC68HC05B6 data sheet applies to the MC68HC05B4,
with the exceptions outlined in this appendix.
A.1
Features
• 4158 bytes User ROM (including 14 bytes User vectors)
• No EEPROM
• High speed version not available
Section 3.5, ‘EEPROM’, therefore, does not apply to the MC68HC05B4, and the register at
address $07 only allows the user to select whether or not the ECLK should appear at PC2, using
bit 3 of $07. All other bits of this register read as ‘0’.
Table A-1 Mode of operation selection
IRQ pin TCAP1 pin PD3
V_SS to V_DD V_SS to V_DD
X
2V_DD
V_DD
0
2V_DD
V_DD
1
2V_DD
V_DD
1
PD4
Mode
X
Single chip
X
Self check
0
Serial RAM loader
1
Jump to any address
MC68HC05B6
Rev. 4
MC68HC05B4
14
TPG
MOTOROLA
A-1