mc68hc908jw32 Freescale Semiconductor, Inc, mc68hc908jw32 Datasheet - Page 96

• Manufacturer Part Number: mc68hc908jw32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Monitor ROM (MON)
delay of two bit times occurs before each echo and before READ, IREAD, or READSP data is returned.
The data returned by a read command appears after the echo of the last byte of the command.
A brief description of each monitor mode command is given in
96
3
FROM HOST
ECHO
Notes:
ECHO
Notes:
ECHO
Description
4
WRITE
1 = Echo delay, 2 bit times
2 = Cancel command delay, 11 bit times
3 = Wait 1 bit time before sending next byte.
FROM HOST
1 = Echo delay, 2 bit times
2 = Data return delay, 2 bit times
3 = Cancel command delay, 11 bit times
4 = Wait 1 bit time before sending next byte.
SENT TO
MONITOR
Returned
Operand
READ
READ
Opcode
Wait one bit time after each echo before sending the next byte.
1
Data
1
WRITE
READ
READ
Table 7-4. READ (Read Memory) Command
Read byte from memory
2-byte address in high-byte:low-byte order
Returns contents of specified address
$4A
3
ADDRESS
4
HIGH
ADDRESS
ADDRESS
HIGH
HIGH
MC68HC908JW32 Data Sheet, Rev. 5
Figure 7-5. Write Transaction
Figure 7-4. Read Transaction
1
ADDRESS
1
HIGH
ADDRESS
ADDRESS
Command Sequence
HIGH
HIGH
3
ADDRESS
NOTE
4
LOW
ADDRESS
ADDRESS
LOW
LOW
1
ADDRESS
1
LOW
ADDRESS
ADDRESS
LOW
LOW
Table 7-4
3
DATA
3, 2
1
through
DATA
DATA
DATA
Table
RETURN
RETURN
4
Freescale Semiconductor
2, 3
7-9.