1.5V低电压供电51核超低待机功耗单片机

1. GENERAL DESCRIPTION

2. FEATURES
 8-bit processor
 256-byte SRAM
 8K-byte OTP ROM
 32-byte DPRAM
 1000KHz RC oscillator for system operation
- Adjustable CPU clock speed: 1, 1/2, 1/4, 1/8, 1/16 for ROSC
 32768Hz RC oscillator & 32768Hz Crystal oscillator circuit for
timebase function
 Low operating voltage: 1.1 V – 1.8 V
 Low standby current, ISTBY < 1uA @1.5V@25℃
 22 general I/O pins (MAX).
PA[7:0] (shared with SEG[7:0])
PB7 (used as RFCIN0 or EXTIN0)
PB6 (share with SEG26)
PB[5:4] (used as RFCOUTIN0)
PB[3:0] (shared with COM[3:0])
PC[7:6] (shared with [X32I, X32O])
PC[1:0] (shared with COM[5:4]/SEG[10:9])
PD0 (shared with SEG8)
PF0 (used as Key strobe in)
 RFC function (PB7 as input, PB[6:4] as output)
 LCD configurations:
- 6 coms x 9 segs (MAX),
- TMBB（64Hz/128Hz/512Hz/1024Hz/2046Hz/4096Hz）
- TMBA（0.5Hz/1Hz/2Hz/4Hz/8Hz/16Hz/32Hz/64Hz/）
- EXTINT0(PB7)
- EXTINT1(PB3)
- Timer0 overflow
- Timer1 overflow
- Key input
 Power down mode
(wakeup sources: key input, TMBB, TMBA, 2KHz, 128Hz,
Timer0, Timer1, EXTINT0, EXTINT1)
 Low power consumption:
- 200uA @ 1.5V, Fcpu = 1MHz for operating mode
- 5uA @ 1.5V, Halt mode
- Istby < 1uA @1.5V
 Internal regulator for LCD operation
 1.25V/1.35V low voltage detector
 Low voltage reset to prevent system runaway at low voltage.
 Buzzer output