MC68HC908AB32CFU Freescale Semiconductor, MC68HC908AB32CFU Datasheet - Page 225

• Manufacturer Part Number: MC68HC908AB32CFU
• Description: IC MCU 8MHZ 32K FLASH 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908AB32CFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, PWM
• Number Of I /o: 51
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

13.7 I/O Registers
13.7.1 PIT Status and Control Register
MC68HC908AB32
Freescale Semiconductor
—
Rev. 1.1
Address:
bits. Some status bits have a two-step read/write clearing procedure. If
software does the first step on such a bit before the break, the bit cannot
change during the break state as long as BCFE is at logic zero. After the
break, doing the second step clears the status bit.
The following I/O registers control and monitor operation of the PIT:
The PIT status and control register does the following:
Reset:
Read:
Write:
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PIT status and control register (PSC)
PIT counter registers (PCNTH:PCNTL)
PIT counter modulo registers (PMODH:PMODL)
Enables PIT interrupt
Flags PIT overflows
Stops the PIT counter
Resets the PIT counter
Prescales the PIT counter clock
Figure 13-3. PIT Status and Control Register (PSC)
$004B
POF
Bit 7
Programmable Interrupt Timer (PIT)
0
0
= Unimplemented
POIE
6
0
PSTOP
1
5
PRST
0
4
0
Programmable Interrupt Timer (PIT)
0
3
0
PPS2
0
2
PPS1
1
0
Technical Data
PPS0
Bit 0
0
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