SM59A16U1
8-Bit Micro-controller
64KB with ISP Flash
& 6K+256B RAM embedded
During hardware reset period, if they meet one of above conditions, chip will switch to ISP mode automatically. After
ISP service program executed, user need to reset the SM59A16U1, either by hardware reset or by WDT, or jump to the
address 0x0000h to re-start the firmware program.
There are 8 kinds of entry mechanisms for user different applications. This entry method will select on the writer or ISP.
(1) First Address Blank. i.e. 0x0000h = 0xFF. And triggered by Internal reset signal.
(2) First Address Blank. i.e. 0x0000h = 0xFF. And triggered by PAD reset signal.
(3) P3.4 = 0. And triggered by Internal reset signal.
(4) P3.4 = 0. And triggered by PAD reset signal.
(5) RXD0 received 0x55 data (baud rate is 57600bps). And triggered by Internal reset signal.
(6) RXD0 received 0x55 data (baud rate is 57600bps). And triggered by PAD reset signal.
(7) USB Endpoint 0 received sequence data: 0x40, 0x20, 0x5A, 0xA5, 0x69, 0x96, 0x02, 0x00. And triggered by
Internal reset signal.
(8) USB Endpoint 0 received sequence data: 0x40, 0x20, 0x5A, 0xA5, 0x69, 0x96, 0x02, 0x00. And triggered by
Internal reset signal.
21.5
ISP register – TAKEY, IFCON, ISPFAH, ISPFAL, ISPFD and ISPFC
Mnemonic
Description
Dir.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
RST
ISP function
Time Access Key
register
Interface Control
register
TAKEY
IFCON
F7h
8Fh
TAKEY [7:0]
ALEC. ALEC.
00H
00H
ITS
CDPR
F32K
F16K
EMEN
ISPE
1
0
ISP Flash
ISPFAH
ISPFAL
Address – High
register
ISP Flash
Address - Low
register
ISP Flash Data
register
E1h
E2h
ISPFAH [7:0]
FFH
FFH
ISPFAL [7:0]
ISPFD [7:0]
ISPFD
ISPFC
E3h
E4h
FFH
00H
ISP Flash Control
register
EMF1 EMF2 EMF3 EMF4
-
ISPF[2:0]
21.6
Time Access Key Register( TAKEY )
Mnemonic: TAKEY
Address: F7H
7
6
5
4
3
2
1
0
Reset
00H
TAKEY [7:0]
ISP enable bit (ISPE) is read-only by default, software must write three specific values 55h, AAh and 5Ah
sequentially to the TAKEY register to enable the ISPE bit write attribute. That is:
MOV TAKEY, #55h
MOV TAKEY, #0AAh
MOV TAKEY, #5Ah
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M071
Ver A SM59A16U1 04/12/2013
- 136 -
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
