Z86E4316PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86E4316PSC' PDF : 84 Pages View PDF
CMOS Z8® OTP Microcontrollers
Product Specification
49
R253 RP
D7 D6 D5 D4 D3 D2 D1 D0
Expanded Register Group
Working Register Group
Default after RESET = 00h
Figure 24. Register Pointer Register
Expanded Register File (ERF). The register file has been expanded to allow for addi-
tional system control registers, mapping of additional peripheral devices and input/output
ports into the register address area. The Z8 register address space RO through R15 is
implemented as 16 groups of 16 registers per group (see Figure 26). These register banks
are known as the Expanded Register File (ERF).
The low nibble (D3-D0) of the Register Pointer (RP) select the active ERF Bank, and the
high nibble (D7-D4) of register RP select the working register group. Three system con-
figuration registers reside in the Expanded Register File at bank FH: PCON, SMR, and
WDTMR. The rest of the Expanded Register is not physically implemented and is
reserved for future expansion.
PS022901-0508
Electrical Characteristics
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