SM59R16A5/SM59R09A5/SM59R05A5
8-Bit Micro-controller
64KB/36KB/20KB with ISP Flash
& 2KB RAM embedded
1.4. RESET
1.4.1. Hardware RESET function
SM59R16A5 provides on-chip hardware RESET mechanism, the reset duration is programmable by writer or ISP。
Internal Reset time
25ms (default)
200ms
100ms
50ms
16ms
8ms
4ms
1.4.2. Software RESET function
SM59R16A5 provides one software reset mechanism to reset whole chip. To perform a software reset, the firmware must
write three specific values 55h, AAh and 5Ah sequentially to the TAKEY register to enable the Software Reset register
(SWRES) write attribute. After SWRES register obtain the write authority, the firmware can write FFh to the SWRES
register. The hardware will decode a reset signal that “OR” with the other hardware reset. The SWRES register is
self-reset at the end of the software reset procedure.
Mnemonic
Description
Direct
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RESET
Software Reset function
Time Access Key
register
Software Reset
register
TAKEY
F7h
E7h
TAKEY [7:0]
SWRES [7:0]
00H
00H
SWRES
1.4.3. Time Access Key register (TAKEY)
Mnemonic: TAKEY
Address: F7H
7
6
5
4
3
2
1
0
Reset
00H
TAKEY [7:0]
Software reset register (SWRES) is read-only by default; software must write three specific values
55h, AAh and 5Ah sequentially to the TAKEY register to enable the SWRES register write attribute. That
is:
MOV TAKEY, #55h
MOV TAKEY, #AAh
MOV TAKEY, #5Ah
1.4.4. Software Reset register (SWRES)
Mnemonic: SWRES
Address: E7H
7
6
5
4
3
2
1
0
Reset
00H
SWRES [7:0]
SWRES [7:0]: Software reset register bit. These 8-bit is self-reset at the end of the reset procedure.
SWRES [7:0] = FFh, software reset.
SWRES [7:0] = 00h ~ FEh, MCU no action.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M047
16
Ver.G SM59R16A5 01/2014
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
