MC9S08SH4CTG Freescale, MC9S08SH4CTG Datasheet - Page 249
MC9S08SH4CTG
Manufacturer Part Number
MC9S08SH4CTG
Description
Manufacturer
Freescale
Datasheet
1.MC9S08SH4CTG.pdf
(338 pages)
Specifications of MC9S08SH4CTG
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
40MHz
Interface Type
I2C/SCI/SPI
Total Internal Ram Size
256Byte
# I/os (max)
13
Number Of Timers - General Purpose
1
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
16
Package Type
TSSOP
Program Memory Type
Flash
Program Memory Size
4KB
Lead Free Status / RoHS Status
Compliant
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16.3.2
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 half is read. This allows coherent 16-bit reads in either big-endian or
little-endian order which makes this more friendly to various compiler implementations. The coherency
mechanism is automatically restarted by an MCU reset or any write to the timer status/control register
(TPMxSC).
Freescale Semiconductor
CLKS[B:A]
PS[2:0]
Field
4–3
2–0
Clock source selects. As shown in
three clock sources to drive the counter prescaler. The fixed system clock source is only meaningful in systems
with a PLL-based or FLL-based system clock. When there is no PLL or FLL, the fixed-system clock source is the
same as the bus rate clock. The external source is synchronized to the bus clock by TPM module, and the fixed
system clock source (when a PLL or FLL is present) is synchronized to the bus clock by an on-chip
synchronization circuit. When a PLL or FLL is present but not enabled, the fixed-system clock source is the same
as the bus-rate clock.
Prescale factor select. This 3-bit field selects one of 8 division factors for the TPM clock input as shown in
Table
the clock source selected to drive the TPM system. The new prescale factor will affect the clock source on the
next system clock cycle after the new value is updated into the register bits.
TPM-Counter Registers (TPMxCNTH:TPMxCNTL)
16-5. This prescaler is located after any clock source synchronization or clock source selection so it affects
CLKSB:CLKSA
Table 16-3. TPMxSC Field Descriptions (continued)
PS2:PS1:PS0
000
001
010
011
100
101
110
111
Table 16-4. TPM-Clock-Source Selection
00
01
10
11
MC9S08SH8 MCU Series Data Sheet, Rev. 3
Table 16-5. Prescale Factor Selection
Table
No clock selected (TPM counter disable)
TPM Clock Source to Prescaler Input
16-4, this 2-bit field is used to disable the TPM system or select one of
TPM Clock Source Divided-by
Fixed system clock
Description
External source
Bus rate clock
128
16
32
64
1
2
4
8
Chapter 16 Timer/PWM Module (S08TPMV3)
249
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