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Z86C34 Datasheet(PDF) 30 Page - Zilog, Inc.

Part # Z86C34
Description  CMOS Z8 MCUs WITH ASCI UART OFFER EFFICIENT, COST-EFFECTIVE DESIGN FLEXIBILITY
PDF  70 Pages
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

Z86C34 Datasheet(HTML) 30 Page - Zilog, Inc.

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Z86C34/C35/C36/C44/C45/C46
CMOS Z8® MCUs with ASCI UART
ZiLOG
30
P R E L I M I N A R Y
DS007601-Z8X0499
FUNCTIONAL DESCRIPTION (Continued)
nal program and data memory from addresses
16384
/32768 to 65535.
Expanded Register File (ERF).
The Z8 register file is ex-
panded to allow for additional system control registers, and
for mapping of additional peripheral devices along with I/O
ports into the register address area. The Z8 register address
space R0 through R15 is implemented as 16 groups of 16
registers per group (Figure 19). These register groups are
known as the Expanded Register File (ERF). Bits 7–4 of reg-
ister RP select the working register group. Bits 3–0 of reg-
ister RP select the expanded register group. Three system
configuration registers reside in the Expanded Register File
at Bank F (PCON, SMR, WDTMR). The rest of the Expand-
ed Register is not physically implemented, and is open for
future expansion.
Figure 18. Data Memory Map
65535
16384/32768
0
External
Data
Memory
NotAddressable
16383/32767
ROM Mode
65535
0
External
Data
Memory
ROMless Mode



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