MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 70

• 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

Bus Control and Input/Output (I/O)
PIPOE — Pipe Status Signal Output Enable Bit
NECLK — No External E Clock Bit
LSTRE — Low Strobe (LSTRB) Enable Bit
RDWE — Read/Write Enable Bit
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Normal modes: Write once
Special modes: Write anytime except the first time
Normal modes: Write anytime
Special modes: Write never
In peripheral mode, E is an input; in all other modes, E is an output.
Normal modes: Write once
Special modes: Write anytime except the first time
LSTRE has no effect in single-chip or normal expanded narrow modes.
LSTRB is for external writes. After reset in normal expanded mode, LSTRB is disabled. If needed, it
must be enabled before external writes. External reads do not normally need LSTRB because all 16
data bits can be driven even if the MCU only needs eight bits of data.
In normal expanded narrow mode, this pin is reset to an output driving high allowing the pin to be an
output while in and immediately after reset.
Normal modes: Write once
Special modes: Write anytime except the first time
RDWE has no effect in single-chip modes.
R/W is used for external writes. After reset in normal expanded mode, it is disabled. If needed, it must
be enabled before any external writes.
1 = PE6 and PE5 are outputs and indicate the state of the instruction queue; no effect in single-chip
0 = PE6 and PE5 are general-purpose I/O; if PLLTE = 1, PE6 is a test output signal from the PLL
1 = PE4 is a general-purpose I/O pin.
0 = PE4 is the external E-clock pin. To get a free-running E-clock in single-chip modes, use
1 = PE3 is configured as the LSTRB bus-control output, except in single-chip or normal expanded
0 = PE3 is a general-purpose I/O pin.
1 = PE2 is configured as the R/W pin. In single-chip modes, RDWE has no effect and PE2 is a
0 = PE2 is a general-purpose I/O pin.
modes.
module.
NECLK = 0 and IVIS = 1. A 16-bit write to PEAR:MODE can configure these bits in one
operation.
narrow modes.
general-purpose I/O pin.
MC68HC812A4 Data Sheet, Rev. 7
Freescale Semiconductor