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Z8018010VSC Datasheet(PDF) 21 Page - Zilog, Inc.

Part # Z8018010VSC
Description  Microprocessor Unit
PDF  85 Pages
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z8018010VSC Datasheet(HTML) 21 Page - Zilog, Inc.

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Z80180
Microprocessor Unit
15
PS014004-1106
Architecture
updated, corrupting the transmit operation in progress. Reading TRDR while a
transmit or receive is in progress must be avoided.
Figure 7. CSIO Block Diagram
Operation Modes
Z80® versus 64180 Compatibility
The Z80180 is descended from two different ancestor processors, ZiLOG's original Z80 and
the Hitachi 64180. The Operating Mode
Control Register (OMCR), illustrated in Figure 8, can be programmed to select between
certain Z80 and 64180 differences.
.
Figure 8. Operating Control Register (OMCR: I/O Address = 3Eh)
M1E (M1 Enable)—
This bit controls the M1 output and is set to a 1
during RESET.
When M1E = 1, the M1 output is asserted Low during the opcode fetch cycle, the INT0
acknowledge cycle, and the first machine cycle of the NMI acknowledge.
Internal Address/Data Bus
CSIO Transmit/Receive
Data Register:
TRDR (8)
CSIO Control Register:
CNTR (8)
Baud Rate
Generator
TXS
RXS
CKS
φ
Interrupt Request
D7
Reserved
D6 D5 —
IOC (R/W)
M1TE (W)
M1E (R/W)
— —— —



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