MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 362

• Manufacturer Part Number: MC68000
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68302 Applications
D-12
IMR
ISR
SIMODE
SCON1
SCM1
SCCE1
SCCM 1
EN_SCC
***SCC1 Parameter Table ***
ST_BD
SS_BD
LN_BD
PT_BD
SZ_BD
FCR_1
MRBLR_1
RXBD_01
TXBD_01
READY
EMPTY
WRAP
* The following values are application dependent for this example
RXBF_01
TXBF_01
BD_CNT
SZ_BF
N_DATA
* SCC1 HDLC Parameters
CMSKL_1
CMSKH_1
DISFC_1
CRCEC_1
ABTSC_1
NMARC _ 1 EQU
RETRC_1
MFLR_1
HMASK 1
********************** Typical M68302 Initialization Code********************
* Register Initialized values in ADS board before execution
* USP = 00080000 ISP = 000040000 (Stack pointer not used)
* Set Base Address = $700000
* Now all 68302 on-chip peripherals begin at address $700xxx
* Set System Control Register
***Setups for interrupt ***
*** Set up Serial Interface Connection ***
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
EQU
ORG
MOVE.W
MOVE.W
MOVE.L
MOVE.W
MOVE.W
MOVE.W
BASE +
BASE +
BASE +
BASE +
BASE +
BASE +
BASE +
$0C
0
1
2
4
$08
BASE+$0480
BASE+$0482
BASE+$0400
BASE+$0440
$07
$07
$05
$030000
$030080
$08
$10
6
BASE+$04A0
BASE+$04A2
BASE+$04A8
BASE+$04AA
BASE+$04AC
BASE+$04AE
BASE+$04B0
BASE+$04B2
BASE+$04B6
INIT
#$2700,SR
#$0700,BAR
#0,SCR
#$0A0,GIMR
#0,IMR
#$FFFF,IPR
MC68302 USER’S MANUAL
$816
$818
$8B4
$882
$884
$888
$88A
;Interrupt Mask Register
;In-Service Register
;Serial Interface Mode Register
;SCC1 Configuration Register
;SCC1 Mode Register
;SCC1 Event Register
;SCC1 Mask Register
;ENR and ENT bits in SCM
;Status and Control in BD
;Status in BD
;Data Length in BD
;Buffer pointer in BD
;Size of BD = 8 bytes
;RFCR and TFCR for SCC1
;Max Rx Buffer Length
;RX BD 0 in SCC1
;TX BD 0 in SCC1
;Ready bit in the 1st byte of TX BD
;Empty bit in the 1st byte of RX BD
;Wrap bit in the 1st byte of BD
;Address of the first RX buffer
;Address of the first TX buffer
;Number of BDs used
;Size of buffer =16 bytes
;Number of data to be sent in a buffer
;CRC Mask Low
;CRC Mask High
;Discard Frame Counter
;CRC Error Counter
;Abort Sequence Counter
;Nonmatching Address Receive Counter
;Frame Retransmission Counter
;Max Frame Length Register
;User-Defined Frame Address Mask
;PC = 00030300
;SR = 2700, mask off interrupts
;BAR = 0700
;Nothing special for this example
;Normal mode, v7–v5 = 5
;Mask off all for now
;Clear IPR
MOTOROLA