SM59264IHHK SYNCMOS [SyncMOS Technologies,Inc], SM59264IHHK Datasheet - Page 9

• Manufacturer Part Number: SM59264IHHK
• Description: 8 - Bit Micro-controller with 128KB flash & 1KB RAM embedded
• Manufacturer: SYNCMOS [SyncMOS Technologies,Inc]

Specifications subject to change without notice,contact your sales representatives for the most recent information.
With this bank mapping scheme, user can access entire 1k byte on-chip RAM with direct addressing method. That
means using the window area ($040~$07F), user can access any bank (64 byte) data of 1k byte on-chip RAM space
which is selected by BS[3:0] of data bank control register (DBANK, $86).
Data Bank Control Register (DBANK, $86)
Data bank select enable bit BSE = 1 enables the data bank select function
Data bank select enable bit BSE = 0 disables the data bank select function
BS[3:0] setting will map $040~$07F RAM space to entire 1k byte on-chip RAM space.
For example, user write #30h to $101 address:
MOV
MOV
MOV
Read:
Write:
Reset value:
BS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
SyncMOS Technologies Inc.
DBANK, #88H
A, #30H
41H, A
May 2002
BS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
BSE
bit-7
0
Unused
BS1
; store #30H to A
; write #30H to $0101 address
; set bank mapping $040~$07f to $0100~$013f
*
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
Unused
*
BS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Unused
040h~07fh map-
*
9/32
0000h~003fh
0040h~007fh
0080h~00bfh
0100h~013fh
0140h~017fh
0180h~01bfh
0200h~023fh
0240h~027fh
0280h~02bfh
ping address
00c0h~00ffh
01c0h~01ffh
02c0h~02ffh
000h~03fh
040h~07fh
080h~0bfh
0c0h~0ffh
BS3
0
on-chip expanded 768 byte RAM
BS2
0
higher 128 byte RAM
higher 128 byte RAM
lower 128 byte RAM
lower 128 byte RAM
Note
BS1
0
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Ver 1.0 PID 59264 05/02
bit-0
BS0
SM59264
1