ez80190 ZiLOG Semiconductor, ez80190 Datasheet - Page 166
ez80190
Manufacturer Part Number
ez80190
Description
Ez80190 Microprocessor
Manufacturer
ZiLOG Semiconductor
Datasheet
1.EZ80190.pdf
(222 pages)
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PS006613-0306
ZCL
ZDA
ZCL
ZDA
Operation Of The eZ80190 Device During ZDI Breakpoints
address
address
lsb of
lsb of
ZDI
ZDI
A0
A0
ZDI Block READ
A block READ operation is initiated the same as a single-byte read; however, the
ZDI master continues to clock in the next byte from the ZDI slave as the ZDI slave
continues to output data. The ZDI register address counter increments with each
read. If the ZDI register address reaches the end of the Read Only ZDI register
address space (
block READ timing.
If the ZDI forces the CPU to break, only the CPU suspends operation. The system
clock continues to operate and drive other peripherals. Those peripherals that can
operate autonomously from the CPU may continue to operate, if so enabled. For
7
7
Read
Read
8
8
1-bit data
separator
1-bit data
separator
Figure 33. ZDI Single-Byte Data Read Timing
1
9
1
9
Figure 34. ZDI Block Data Read Timing
20h
DATA
DATA
byte 1
msb
D7
msb
D7
of
1
), the address stops incrementing.
of
1
D6
D6
2
2
PRELIMINARY
D5
3
ZDI Data Byte
ZDI Data Bytes
D4
4
D1
7
byte 1
D3
DATA
5
D0
lsb
8
of
eZ80190 Product Specification
1-bit data
separator
D2
6
9
1
Figure 34
DATA
byte 2
D1
7
msb
D7
of
1
DATA
ZiLOG Debug Interface
D0
lsb
of
8
illustrates ZDI
D6
2
START signal
End of data
or new ZDI
1
9
152
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