Z51F0410 Datasheet, PDF (172/184 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F0410
Product Specification
8.5 Parallel Mode
8.5.1 Overview
Parallel program mode transfers address and data by byte. 3-byte address can be entered by one
from the lease significant byte of address. If only LSB is changed, only one byte can be transferred.
And if the second byte is changed, the first and second byte can be transferred. Upper 4-bit of the
most significant byte selects memory to be accessed. Table 8-1 shows memory type. Address auto-
increment is supported when read or write data without address
RESETB
nRD
nWR
nALE
PDATA[7:0]
ADDRH[7:4]
0
0
0
0
0
0
Figure 8.7 Pin diagram for parallel programming
Table 8-3 The selection of memory type by ADDRH[7:4]
Memory Type
0
0
Program Memory
0
1
External Memory
1
0
SFR
PS029502-0212
PRELIMINARY
169