MC68HC912B32VFU8 Freescale Semiconductor, MC68HC912B32VFU8 Datasheet - Page 212
MC68HC912B32VFU8
Manufacturer Part Number
MC68HC912B32VFU8
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68HC912B32VFU8.pdf
(334 pages)
Specifications of MC68HC912B32VFU8
Cpu Family
HC12
Device Core Size
16b
Frequency (max)
8MHz
Interface Type
SCI/SPI
Program Memory Type
EPROM
Program Memory Size
32KB
Total Internal Ram Size
1KB
# I/os (max)
63
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
4.5V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 105C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
80
Package Type
PQFP
Lead Free Status / Rohs Status
Not Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC912B32VFU8
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
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Serial Interface
INCLUDE 'EQUATES.ASM'
; User Variables
; Bit Equates
; ----------------------------------------------------------------------
;
; ----------------------------------------------------------------------
;
MAIN:
FINISH:
; ----------------------------------------------------------------------
;*
; ----------------------------------------------------------------------
INIT:
;
;
;
; ----------------------------------------------------------------------
;*
; ----------------------------------------------------------------------
TRANSMIT:
;
;
FLAG:
DONE:
; ----------------------------------------------------------------------
;
; ----------------------------------------------------------------------
DATA:
EOT:
212
TABLE OF DATA TO BE TRANSMITTED
ORG
BSR
BSR
BRA
BSET
MOVB
MOVB
MOVB
MOVB
LDX
LDAA
LDAA
BSET
RTS
LDAA
BEQ
BCLR
STAA
BRCLR
BSET
BRA
RTS
DC.B
DC.B
DC.B
END
TRANSMIT SUBROUTINE
SUBROUTINE INIT:
MAIN PROGRAM
$7000
INIT
TRANSMIT
FINIS
PORTS,#$80
#$E0,DDRS
#$07,SP0BR
#$12,SP0CR1
#$08,SP0CR2
#DATA
SP0SR
SP0DR
SP0CR1,#$40
1,X+
DONE
PORTS,#$80
SP0DR
SP0SR,#$80,FLAG
PORTS,#$80
TRANSMIT
'Freescale'
$0D,$0A
$00
;Equates for all registers
M68HC12B Family Data Sheet, Rev. 9.1
; 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
; SET SS Line High to prevent glitch
; Configure PORT S input/ouput levels
; MOSI, SCK, SS* = ouput, MISO=Input
; Select serial clock baud rate < 100 KHz
; Configure SPI(SP0CR1): No SPI interrupts,
; MSTR=1, CPOL=0, CPHA=0
; Config. PORTS output drivers to operate normally,
; and with active pull-up devices.
; Use X register as pointer to first character
; 1st step to clear SPIF Flag, Read SP0SR
; 2nd step to clear SPIF Flag, Access SP0DR
; Enable the SPI (SPE=1)
; Return from subroutine
; Load Acc. with "NEW" character to send, Inc X
; Detect if last character(0) has been transmitted
; If last char. branch to DONE, else
; Assert SS Line to start X-misssion.
; Load Data into Data Reg.,X-mit.
; it is also the 2nd step to clear SPIF flag.
;Wait for flag.
; Disassert SS Line.
; Continue sending characters, Branch to TRANSMIT.
; Return from subroutine
; Return (cr) ,Line Feed (LF)
; Byte used to test end of data = EOT
; End of program
Freescale Semiconductor
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