MC68HC08AZ60 Datasheet, PDF (383/452 Pages) Motorola, Inc – Advance Information

Freescale Semiconductor, Inc.
Timer Interface Module A (TIMA-6)
I/O Registers
Register Name and Address TCNTH — $0022
Bit 7
6
5
4
3
2
1
Read: BIT 15 BIT 14 BIT 13 BIT 12 BIT 11 BIT 10 BIT 9
Write: R
R
R
R
R
R
R
Reset: 0
0
0
0
0
0
0
Bit 0
BIT 8
R
0
Register Name and Address TCNTL — $0023
Bit 7
6
5
4
3
2
1
Bit 0
Read: BIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
Write: R
R
R
R
R
R
R
R
Reset: 0
0
0
0
0
0
0
0
R
= Reserved
Figure 5. TIMA Counter Registers (TCNTH and TCNTL)
TIMA Counter
Modulo Registers
The read/write TIMA modulo registers contain the modulo value for the
TIMA counter. When the TIMA counter reaches the modulo value, the
overflow flag (TOF) becomes set, and the TIMA counter resumes
counting from $0000 at the next clock. Writing to the high byte
(TAMODH) inhibits the TOF bit and overflow interrupts until the low byte
(TAMODL) is written. Reset sets the TIMA counter modulo registers.
21-tima-6
MOTOROLA
MC68HC08AZ60 — Rev 1.0
Timer Interface Module A (TIMA-6)
383
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