MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 184

• 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

Serial Peripheral Interface (SPI)
When CPHA = 1, the master begins driving its MOSI pin and the slave begins driving its MISO pin on the
first serial clock edge. The SS pin can remain low between transmissions. This format may be preferable
in systems having only one slave driving the master MISO line.
184
MINIMUM t
MSB FIRST (LSBF = 0)
CAPTURE STROBE
LSB FIRST (LSBF = 1)
FROM MASTER
FROM SLAVE
L
SCK CYCLES
, t
T
TO SLAVE
CPOL = 0
CPOL = 1
, and t
The slave SCK pin must be in the proper idle state before the slave is
enabled.
MOSI
MISO
MASTER SS
SCK
SCK
MISO/MOSI
MASTER SS
I
MISO/MOSI
SLAVE SS
SS
SLAVE SS
CPHA = 0
= 1/2 SCK CYCLE
CPHA = 1
t
L
Figure 15-5. Slave SS Toggling When CPHA = 0
Figure 15-6. Transmission Format 1 (CPHA = 1)
MSB
LSB
1
BEGIN
TRANSFER
Figure 15-7. Slave SS When CPHA = 1
BIT 6
BIT 1
BYTE 1
BYTE 1
2
MC68HC812A4 Data Sheet, Rev. 7
BIT 5
BIT 2
3
NOTE
BIT 4
BIT 3
4
BYTE 2
BYTE 2
BIT 3
BIT 4
5
BIT 2
BIT 5
6
BYTE 3
BYTE 3
BIT 1
BIT 6
7
Freescale Semiconductor
MSB
LSB
8
t
T
t
I
END
TRANSFER