ZLR64400ROMMCU datasheet(39/155 Pages) ZILOG

tên linh kiện	ZLR64400ROMMCU

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PS024502-1205

P R E L I M I N A R Y

ZLR64400 ROM MCU

Product Specification

This device features 1056 bytes of register file space, organized in 256-byte banks. Bank 0

contains 237 bytes of RAM addressed as general-purpose registers, 4 port addresses (of

which one is reserved), and 16 control register addresses. Banks 1, 2, and 3 each contain

256 general-purpose register bytes. Banks D and F each contain 16 addresses for control

registers. All other banks are reserved and must not be selected.

The current bank is selected for 8-bit direct or indirect addressing by writing Register

Pointer bits RP[3:0]. In the current bank, a 16-byte working register group (addressed as

R0R15) is selected by writing RP[7:4]. A working register operand requires only 4 bits

of program memory. There are 16 working register groups per bank. See Figure 9 on

page 31 and Figure 10 on page 32.

Figure 8. Program/Constant Memory Map

Program

IRQ 05

000Ch (Reset)

ROM Memory

Vectors

0000h

= 16-bit Address

Not to Scale

Constants

FFFFh

ZLR64400ROMMCU bảng dữ liệu(PDF) 39 Page - Zilog, Inc.