MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 168

• 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 Communications Interface Module (SCI)
14.6 Register Descriptions and Reset Initialization
This section provides register descriptions and reset initialization.
14.6.1 SCI Baud Rate Registers
Read: Anytime
Write: SBR[12:0] anytime; BTST, BSPL, and BRLD only in special modes
BTST — Reserved for test function
BSPL — Reserved for test function
BRLD — Reserved for test function
SBR[12:0] — SCI Baud Rate Bits
BR = value written to SBR[12:0], a value from 1 to 8191
168
The value written to SBR[12:0] determines the baud rate of the SCI. The new value takes effect when
the low order byte is written. The formula for calculating baud rate is:
Reset:
Reset:
Read:
Write:
Read:
Write:
SCI0: $00C0
SCI1: $00C8
SCI0: $00C1
SCI1: $00C9
The baud rate generator is disabled until the TE bit or the RE bit is set for
the first time after reset. The baud rate generator is disabled when BR = 0.
Figure 14-17. SCI Baud Rate Register High (SC0BDH or SC1BDH)
Figure 14-18. SCI Baud Rate Register Low (SC0BDL or SC1BDL)
SBR7
BTST
Bit 7
Bit 7
0
0
SBR6
BSPL
6
0
6
0
MC68HC812A4 Data Sheet, Rev. 7
SCI baud rate
BRLD
SBR5
5
0
5
0
SBR12
SBR4
NOTE
4
0
4
0
=
-------------------- -
16
SBR11
SBR3
MCLK
3
0
3
0
×
BR
SBR10
SBR2
2
0
2
1
SBR9
SBR1
1
0
1
0
Freescale Semiconductor
SBR8
SBR0
Bit 0
Bit 0
0
0