参数资料
型号: MC68HC705E5DW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 135/148页
文件大小: 620K
代理商: MC68HC705E5DW
Motorola Bus (M Bus) Interface
M-Bus Registers
MC68HC705E5 Rev. 1.0
General Release Specification
MOTOROLA
Motorola Bus (M Bus) Interface
87
NON-DISCLOSURE
AGREEMENT
REQUIRED
Figure 11-9. Flowchart of M-Bus Interrupt Routine
CLEAR MIF
MASTER
TX/RX
LAST BYTE
TO BE READ
LAST BYTE
TRANSMITTED
TX
RX
RXAK=0
N
WRITE NEXT
BYTE TO MDR
GENERATE
STOP SIGNAL
Y
N
Y
SET TXAK = 1
N
GENERATE
STOP SIGNAL
Y
READ DATA FROM
MDR AND STORE
CLEAR MAL
Y
N
MAAS = 1
SRW = 1
Y
TX/RX
READ MDR
AND STORE
SET
TX MODE
WRITE
TO MDR
SET
RX MODE
DUMMY READ
FROM MDR
ACK FROM
RECEIVER
TX NEXT
BYTE
SWITCH TO
RX MODE
DUMMY READ
FROM MDR
ARBITRATION
LOST
LAST 2nd BYTE
TO BE READ
RTI
N
Y
TX
RX
N
Y
N
N (WRITE)
Y (READ)
YN
MODE
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