MC68HC05L28 Datasheet, PDF (12/156 Pages) Motorola, Inc – Flexible general-purpose microcomputer

Paragraph
Number
TITLE
Page
Number
8.3.7
8.3.8
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.5
8.5.1
8.5.2
8.5.3
8.5.4
8.5.5
8.5.6
8.5.7
8.5.8
Clock synchronization ......................................................................................8-5
Handshaking .................................................................................................... 8-5
Registers ...............................................................................................................8-6
I²C-bus address register (MADR) ....................................................................8-6
I²C-bus frequency divider register (FDR).........................................................8-6
I²C-bus control register (MCR) ........................................................................8-7
I²C-bus status register (MSR)..........................................................................8-8
I²C-bus data register (MDR) ............................................................................8-10
Programming .........................................................................................................8-10
Initialization ......................................................................................................8-10
START signal and the first byte of data............................................................8-10
Software response ...........................................................................................8-11
Generation of a STOP signal ...........................................................................8-12
Generation of a repeated START signal ..........................................................8-12
Slave mode ......................................................................................................8-13
Arbitration lost ..................................................................................................8-13
Operation during STOP and WAIT modes .......................................................8-13
9
A/D CONVERTER
9.1 A/D converter operation.........................................................................................9-1
9.2 A/D registers..........................................................................................................9-3
9.2.1 A/D status/control register (ADSTAT)...............................................................9-3
9.2.1.1
COCO — Conversion complete flag ..........................................................9-3
9.2.1.2
ADRC — A/D RC oscillator control ............................................................9-3
9.2.1.3
ADON — A/D converter on ........................................................................9-3
9.2.1.4
CH3 – CH0 — A/D channels 3, 2, 1 and 0.................................................9-4
9.2.2 A/D input register (ADIN) .................................................................................9-5
9.2.3 A/D result data register (ADDATA) ...................................................................9-5
9.3 ADx analog input ...................................................................................................9-6
10
RESETS AND INTERRUPTS
10.1 Resets .................................................................................................................10-1
10.1.1 Power-on reset...............................................................................................10-1
10.1.2 RESET pin .....................................................................................................10-1
10.1.3 Computer operating properly (COP) reset.....................................................10-2
10.2 Interrupts .............................................................................................................10-2
10.2.1 Non-maskable software interrupt (SWI).........................................................10-3
10.2.2 Maskable hardware interrupts........................................................................10-3
10.2.2.1
External interrupt (IRQ0, IRQ1, IRQ2) .....................................................10-5
10.2.2.2
Real time and core timer (CTIMER) interrupts.........................................10-7
MOTOROLA
iv
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MC68HC05L28