M68EVB908GB60E Freescale Semiconductor, M68EVB908GB60E Datasheet - Page 162

• Manufacturer Part Number: M68EVB908GB60E
• Description: BOARD EVAL FOR MC9S08GB60
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of M68EVB908GB60E

• Contents: Module and Misc Hardware
• Processor To Be Evaluated: MC9S08GB
• Data Bus Width: 8 bit
• Interface Type: RS-232
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08GB
• Kit Contents: GB60 Evaluation Kit
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08GB60
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Timer/PWM (TPM) Module
PS2:PS1:PS0 — Prescale Divisor Select
10.7.2
The two read-only TPM counter registers contain the high and low bytes of the value in the TPM counter.
Reading either byte (TPMxCNTH or TPMxCNTL) latches the contents of both bytes into a buffer where
they remain latched until the other byte is read. This allows coherent 16-bit reads in either order. The
coherency mechanism is automatically restarted by an MCU reset, a write of any value to TPMxCNTH or
TPMxCNTL, or any write to the timer status/control register (TPMxSC).
Reset clears the TPM counter registers.
162
This 3-bit field selects one of eight divisors for the TPM clock input as shown in
prescaler is located after any clock source synchronization or clock source selection, so it affects
whatever clock source is selected to drive the TPM system.
Timer x Counter Registers (TPMxCNTH:TPMxCNTL)
Reset:
Reset:
Read:
Write:
Read:
Write:
PS2:PS1:PS0
Figure 10-6. Timer x Counter Register High (TPMxCNTH)
Figure 10-7. Timer x Counter Register Low (TPMxCNTL)
0:0:0
0:0:1
0:1:0
0:1:1
1:0:0
1:0:1
1:1:0
1:1:1
Bit 15
Bit 7
Bit 7
Bit 7
0
0
Table 10-2. Prescale Divisor Selection
MC9S08GB/GT Data Sheet, Rev. 2.3
14
6
0
6
6
0
Any write to TPMxCNTH clears the 16-bit counter.
Any write to TPMxCNTL clears the 16-bit counter.
13
5
0
5
5
0
TPM Clock Source Divided-By
12
4
0
4
4
0
128
11
16
32
64
3
0
3
3
0
1
2
4
8
10
2
0
2
2
0
Freescale Semiconductor
1
9
0
1
1
0
Table
10-2. This
Bit 0
Bit 8
Bit 0
Bit 0
0
0