MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 51

• Manufacturer Part Number: MC812A4CPVE8
• Description: IC MCU 16BIT EEPROM 4K 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC812A4CPVE8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 83
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: EEPROM
• 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: 112-LQFP
• Processor Series: HC812A
• Core: HC12
• Data Bus Width: 16 bit
• Data Ram Size: 1 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 91
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Controller Family/series: 68HC12
• No. Of I/o's: 91
• Eeprom Memory Size: 4KB
• Ram Memory Size: 1KB
• Cpu Speed: 8MHz
• No. Of Timers: 1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

4.4 Interrupt Registers
This section describes the interrupt registers.
4.4.1 Interrupt Control Register
Read: Anytime
Write: Varies from bit to bit
IRQE — IRQ Edge-Sensitive-Only Bit
IRQEN — IRQ Enable Bit
DLY — Oscillator Startup Delay on Exit from Stop Mode Bit
4.4.2 Highest Priority I Interrupt Register
Read: Anytime
Write: Only if I mask in CCR = 1 (interrupts inhibited)
To give a maskable interrupt source highest priority, write the low byte of the vector address to the HPRIO
register. For example, writing $F0 to HPRIO assigns highest maskable interrupt priority to the real-time
Freescale Semiconductor
IRQE can be written once in normal modes. In special modes, IRQE can be written anytime, but the
first write is ignored.
IRQEN can be written anytime in all modes. The IRQ pin has an internal pullup.
DLY can be written once in normal modes. In special modes, DLY can be written anytime.
The delay time of about 4096 cycles is based on the M-clock rate chosen.
1 = IRQ responds only to falling edges.
0 = IRQ pin responds to low levels.
1 = IRQ pin and key wakeup D connected to interrupt logic
0 = IRQ pin and key wakeup D disconnected from interrupt logic
1 = Stabilization delay on exit from stop mode
0 = No stabilization delay on exit from stop mode
Address: $001E
Address: $001F
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 4-2. Highest Priority I Interrupt Register (HPRIO)
IRQE
Bit 7
Bit 7
0
1
1
Figure 4-1. Interrupt Control Register (INTCR)
= Unimplemented
= Unimplemented
IRQEN
6
1
6
1
1
MC68HC812A4 Data Sheet, Rev. 7
PSEL5
DLY
5
1
5
1
PSEL4
4
0
0
4
1
PSEL3
3
0
0
3
0
PSEL2
2
0
0
2
0
PSEL1
1
0
0
1
1
Bit 0
Bit 0
Interrupt Registers
0
0
0
0
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