single wire interface communication

NAPA AID com

HW circuit

AID MASTER:
receiver: AID-bus to BUF to MCU
thransmiter: MCU to NOR-BUF to mos-gate to mos-drain(AID-bus) + pull-up res to V_DD

AID SLAVER:
receiver: AID-bus to BUF to MCU
thransmiter: MCU to NOR-BUF to mos-gate to mos-drain(AID-bus)

AID slaver BOOOOM: Cap:100pF 25V C0G
ATCPZ003-UUCZ ATMEL ROSWELL AUTH MFi
AS3616A-AFCT-13 BIGTEN

I2C IF: ATCPZ003-MXHDB ATMEL ROSWELL AUTH MFi

HW timing @DY

0: low:8.2us high:2.8us
1: low:2.8us high:8.2us

my test result :baudrate 1M

串口时序：1M baudrate 1起始位 8位数据 2停止位 无校验
-> All 11bits: START 1bit + 8bits数据 + 停止位2bit(拉高~2us)

个人测试：
0:0x00(低9高2) 0x80(低8高3)
1:0xFE(低2高9) 0xFC(低3高8)

TI HDQ uart handle:

Receiver: logic 0: 0x80 0xC0 0xE0 0xF0 logic 1: 0xFE 0xFC

Transmit: logic 0: 0xC0 logic 1: 0xFE

Judge: logic 0: <= 0xF8 logic 1: > 0xF8

AT21CS01 AT21CS11 Routine (SWI EEPROM)

High-Speed
0:low 1us high 14us
1:low 10us high 5us

Standard Speed
0:low 4us high 41us
1:low 24us high 21us

AC measurement conditions for the table above:
– Loading capacitance on SI/O: 100 pF
– RPUP (bus line pull-up resistor to VPUP): 1 kΩ; VPUP: 2.7V

AT21CS11 DC Characteristics: R_PUP min:0.2 — max:1.8 kΩ @VPUP = 2.7V R_PUP 0.4 — 5.4 kΩ @VPUP = 4.5V C_BUS max:1000 pF Input Low Level(3)(4) VIL –0.6 — 0.5 V Input High Level(3)(4) VIH VPUP x 0.7 — VPUP + 0.5 V

AT21CSxx DS

AT21CS11 Plot

AT21CS11 CODE