MC68HC912B32VFU8 Freescale Semiconductor, MC68HC912B32VFU8 Datasheet - Page 144

• Manufacturer Part Number: MC68HC912B32VFU8
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC912B32VFU8

• Cpu Family: HC12
• Device Core Size: 16b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 1KB
• # I/os (max): 63
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 105C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 80
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

Standard Timer (TIM)
12.3.4 Timer Count Register
Read: Anytime
Write: Has no meaning or effect in normal mode; only writable in special modes
A full access for the counter register should take place in one clock cycle. A separate read/write for high
byte and low byte will give a different result than accessing them as a word.
The period of the first count after a write to the TCNT registers may be a different size because the write
is not synchronized with the prescaler clock.
12.3.5 Timer System Control Register
Read: Anytime
Write: Anytime
TEN — Timer Enable Bit
TSWAI — Timer Stops While in Wait Bit
144
If for any reason the timer is not active, there is no ÷64 clock for the pulse accumulator since the E ÷
64 is generated by the timer prescaler.
Timer interrupts cannot be used to get the MCU out of wait.
0 = Disables timer, including the counter; can be used for reducing power consumption
1 = Allows timer to function normally
0 = Allows timer to continue running during wait
1 = Disables timer when MCU is in wait mode
Address: $0084
Address: $0085
Address: $0086
Reset:
Reset:
Reset:
Read:
Read:
Read:
Write:
Write:
Write:
Bit 15
Bit 7
Bit 7
Bit 7
Bit 7
TEN
Figure 12-7. Timer System Control Register (TSCR)
0
0
0
Figure 12-6. Timer Count Register (TCNT)
= Unimplemented
= Unimplemented
TSWAI
Bit 14
Bit 6
6
0
6
0
6
0
M68HC12B Family Data Sheet, Rev. 9.1
TSBCK
Bit 13
Bit 5
5
0
5
0
5
0
TFFCA
Bit 12
Bit 4
4
0
4
0
4
0
Bit 11
Bit 3
3
0
3
0
3
0
0
Bit 10
Bit 2
2
0
2
0
2
0
0
Bit 9
Bit 1
1
0
1
0
1
0
0
Freescale Semiconductor
Bit 0
Bit 8
Bit 0
Bit 0
Bit 0
0
0
0
0