SM59A16U1
8-Bit Micro-controller
64KB with ISP Flash
& 6K+256B RAM embedded
4.10
Interface Control Register( IFCON )
Mnemonic: IFCON
Address: 8Fh
7
-
6
5
4
3
2
1
0
Reset
00H
CDPR
F32K
F16K
-
EMEN
ISPE
CDPR: code protect (Read Only)
F32K: flash size is 32KB+4KB (Read Only)
F16K: flash size is 16KB+4KB (Read Only)
EMEN: Internal 6K SRAM enable.(default is enable)
EMEN = 0, Enable internal 6K RAM and external 58K RAM.
EMEN = 1, Disable internal 6K RAM, Enable external 64K RAM.
ISPE: ISP function enable bit
ISPE = 1, enable ISP function
ISPE = 0, disable ISP function
4.11
Page Select( PAGESEL )
The SM59A16U1 provide two different methods to set Special Function Register (SFR) are as follow:
SFR Method 1 (Indirect Mode): This method is only an SFR page. If you want to use
PWM or USB registers of the Method 2, can be used indirectly addressable setting.
Example: Write a data 0x80h to PWMEN Register in Method 1.
PAGESEL = 0x0h;
// Method 1.
PWMADDR = 0xF5h; // PWMEN indirect address: 0xF5h (Indirect mode)
// (Refer Page1 Table of the Method 2)
PWMDATA = 0x80h; // Write data 0x80h to PWMEN.
SFR Method 2 (Page Mode): This method provides two SFR page to set the registers.
Example: Write a data 0x80h to PWMEN Register in Method 2, Page 1.
PAGESEL = 0x3h;
PWMEN = 0x80h;
// Method 2, Page 1 (Page mode)
// Write data 0x80h to PWMEN.
SFR Page Mode Table:
Page_mode
Page_num
SFR Select
SFR Method 1
0
0
1
1
0
1
0
1
SFR Method 1
SFR Method 2, Page 0
SFR Method 2, Page 1
Mnemonic: PAGESEL
Address: BEh
7
6
5
4
3
2
1
0
Reset
-
Page_num
Page_mode
00H
Page_num: This flag is used only in the SFR method 2.
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M071 Ver A SM59A16U1 04/12/2013
- 37 -
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
