MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 192

• 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)
15.9 Interrupt Sources
15.10 General-Purpose I/O Ports
Port S shares its pins with the multiple serial interface (MSI). In all modes, port S pins PS7–PS0 are
available for either general-purpose I/O or for SCI and SPI functions. See
Interface
15.11 Synchronous Character Transmission Using the SPI
This program is intended to communicate with the HC11 on the UDLP1 board. It utilizes the SPI to
transmit synchronously characters in a string to be displayed on the LCD display. The program must
configure the SPI as a master, and non-interrupt driven. The slave peripheral is chip-selected with the SS
line at low voltage level. Between 8 bit transfers the SS line is held high. Also the clock idles low and
takes data on the rising clock edges. The serial clock is set not to exceed 100 kHz baud rate.
15.11.1 Equipment
For this exercise, use the M68HC812A4EVB emulation board.
15.11.2 Code Listing
INCLUDE 'EQUATES.ASM'
; User Variables
; Bit Equates
; ----------------------------------------------------------------------
;
; ----------------------------------------------------------------------
;
MAIN:
FINISH:
192
(MSI).
ORG
BSR
BSR
BRA
Transmission complete
Mode fault
A comment line is delimited by a semicolon. If there is no code before
comment, a semicolon (;) must be placed in the first column to avoid
assembly errors.
MAIN PROGRAM
$7000
INIT
TRANSMIT
FINIS
Interrupt
Source
;Equates for all registers
Table 15-4. SPI Interrupt Sources
MC68HC812A4 Data Sheet, Rev. 7
; 16K On-Board RAM, User code data area,
; start main program at $7000
; Subroutine to initialize SPI registers
; Subroutine to start transmission
; Finished transmitting all DATA
MODF
SPIF
Flag
NOTE
Enable
Local
SPIE
Mask
CCR
I bit
Chapter 13 Multiple Serial
$FFD8, $FFD9
Address
Vector
Freescale Semiconductor