MC68HC08AZ60CFU MOTOROLA [Motorola, Inc], MC68HC08AZ60CFU Datasheet - Page 276

• Manufacturer Part Number: MC68HC08AZ60CFU
• Description: Advance Information
• Manufacturer: MOTOROLA [Motorola, Inc]

Modulo Timer (TIM)
TIM Counter
Registers
MC68HC08AZ60 — Rev 1.0
276
NOTE:
Address: $004C
PS[2:0] — Prescaler Select Bits
The two read-only TIM counter registers contain the high and low bytes
of the value in the TIM counter. Reading the high byte (TCNTH) latches
the contents of the low byte (TCNTL) into a buffer. Subsequent reads of
TCNTH do not affect the latched TCNTL value until TCNTL is read.
Reset clears the TIM counter registers. Setting the TIM reset bit (TRST)
also clears the TIM counter registers.
If you read TCNTH during a break interrupt, be sure to unlatch TCNTL
by reading TCNTL before exiting the break interrupt. Otherwise, TCNTL
retains the value latched during the break.
Reset:
Read:
Write:
Freescale Semiconductor, Inc.
These read/write bits select one of the seven prescaler outputs as the
input to the TIM counter as
bits.
For More Information On This Product,
PS[2:0]
Bit 15
Figure 4. TIM Counter Registers (TCNTH–TCNTL)
000
001
010
100
101
Bit 7
011
110
111
0
Go to: www.freescale.com
Modulo Timer (TIM)
14
6
0
Table 2. Prescaler Selection
13
5
0
Table 2
12
4
0
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock
Internal Bus Clock 1
TIM Clock Source
shows. Reset clears the PS[2:0]
11
3
0
10
2
0
16
32
64
64
2
8
4
1
9
0
MOTOROLA
Bit 0
Bit 8
0
8-tim