MC68HC08AZ60ACFU MOTOROLA [Motorola, Inc], MC68HC08AZ60ACFU Datasheet - Page 284

• Manufacturer Part Number: MC68HC08AZ60ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

Timer Interface Module B (TIMB)
18.4 Functional Description
18.4.1 TIMB Counter Prescaler
Advance Information
284
$0047
$0048
$0049
$004A
Addr.
TIMB Ch. 1 Register High (TBCH1H)
TIMB Ch. 0 Register Low (TBCH0L)
TIMB Ch. 1 Register Low (TBCH1L)
TIMB Ch. 1 Status/Control Register
Register Name
Figure 18-1
TIMB is the 16-bit TIMB counter that can operate as a free-running
counter or a modulo up-counter. The TIMB counter provides the timing
reference for the input capture and output compare functions. The TIMB
counter modulo registers, TBMODH–TBMODL, control the modulo
value of the TIMB counter. Software can read the TIMB counter value at
any time without affecting the counting sequence.
The two TIMB channels are programmable independently as input
capture or output compare channels.
The TIMB clock source can be one of the seven prescaler outputs or the
TIMB clock pin, PTD4/ATD12/TBCLK. The prescaler generates seven
clock rates from the internal bus clock. The prescaler select bits, PS[2:0],
in the TIMB status and control register select the TIMB clock source.
Figure 18-2. TIMB I/O Register Summary
(TBSC1)
Timer Interface Module B (TIMB)
W:
W:
W:
W:
R:
R:
R:
R:
shows the TIMB structure. The central component of the
Bit 7
CH1F
Bit 15
Bit 7
Bit 7
R
0
= Reserved
CH1IE
14
6
6
6
13
R
5
5
0
5
MS1A
12
4
4
4
ELS1B
11
3
3
3
MC68HC08AZ60A — Rev 0.0
ELS1A
10
2
2
2
TOV1
1
1
9
1
MOTOROLA
CH1MAX
Bit 0
Bit 0
Bit 8
Bit 0