SM89T16R1 Datasheet, PDF (29/34 Pages) SyncMOS Technologies,Inc – 8-Bits Micro-controller With 64KB Flash ROM & IKB RAM & Two UART & RTC & ADC & PWM embedded

SyncMOS Technologies Inc.
SM89T16R1
8-Bits Micro-controller
With 64KB Flash ROM & IKB RAM & Two UART & RTC & ADC & PWM embedded
Dual DPTR Function
The DPS.0 define the instruction of INC DPTR AND DEC DPTR are working in DPTR0 or DPTR1.
DPS ($A6H)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
DPS
DPS = 1 the instruction of INC DPTR and DEC DPTR are working in DPTR1.
= 0 the instruction of INC DPTR and DEC DPTR are working in DPTR0.
DPH ($83H)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
DPL ($82H)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
DPH1 ($A5H)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
DPL1 ($A4H)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Data SRAM
The Expand 768 bytes RAM test.
The SCONF.1 must set to ‘1’ to enable the Expand 768 bytes RAM, and this Expand RAM area must read/write by
using the MOVX instruction.
SCONF ($BFH)
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
SMOD_1
PDWUE
SMOD_1: This bit set to ‘1’ to make the serial port 1 baud-rate double.
PDWUE: When set to ‘1’, enable the PDWU function.
OME: When set to ‘1’, enable the 768 bytes expanded RAM.
ALEI: When set to ‘1’, it will stop ALE clock output for EMI reduce.
Bit1
OME
Bit0
ALEI
Power Management Mode (PMM)
Power Management Mode offers a complete scheme of reduced internal clock speeds that allow the CPU to run
software but to use substantially less power. Normally, during default operation, the SM89T16R1 uses 4 clocks per
machine cycle. Thus the instruction cycle (machine cycle clock) rate is clock/4. At 16 MHz crystal speed, the
instruction cycle speed is 4 MHz. In Power Management Mode (PMM) the instruction cycle (machine cycle clock)
rate is clock/1024. At same 16 MHz crystal speed, the instruction cycle speed is 15.6 KHz. The operation current is
down from 20mA to 5mA. See Table 5.
Table 5
Crystal Speed
Full Operation (4 clocks/machine cycle)
Instruction rate/operation current
PMM (1024 clocks/machine cycle)
Instruction rate/operation current
11.0592 MHz
2.765 MHz/19.6 mA
10.8 KHz/4.78 mA
16 MHz
4.0 MHz/20 mA
15.6 kHZ/5 mA
25 MHz
6.25 MHz/30 mA
24.4 kHz/5.6 mA
Specifications subject to change without notice contact your sales representatives for the most recent information.
SM89T16R1 V1.0 JANUARY 2005
29