mc68hc708mp16 Freescale Semiconductor, Inc, mc68hc708mp16 Datasheet - Page 242

• Manufacturer Part Number: mc68hc708mp16
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Timer Interface Module B (TIMB)
12.9.2 TIMB Counter Registers
Technical Data
242
NOTE:
TBCNTH
TBCNTL
The two read-only TIMB counter registers contain the high and low bytes
of the value in the TIMB counter. Reading the high byte (TBCNTH)
latches the contents of the low byte (TBCNTL) into a buffer. Subsequent
reads of TBCNTH do not affect the latched TBCNTL value until TBCNTL
is read. Reset clears the TIMB counter registers. Setting the TIMB reset
bit (TRST) also clears the TIMB counter registers.
If you read TBCNTH during a break interrupt, be sure to unlatch TBCNTL
by reading TBCNTL before exiting the break interrupt. Otherwise,
TBCNTL retains the value latched during the break.
$0040
$0041
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 12-5. TIMB Counter Registers (TBCNTH:TBCNTL)
Bit 15
Bit 7
Bit 7
Bit 7
Timer Interface Module B (TIMB)
0
0
= Unimplemented
14
6
0
6
6
0
13
5
0
5
0
5
12
4
0
4
4
0
11
3
0
3
3
0
MC68HC708MP16
Freescale Semiconductor
10
2
0
2
0
2
1
0
1
0
9
1
—
Rev. 3.1
Bit 0
Bit 0
Bit 8
Bit 0
0
0