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AW9136 Datasheet(PDF) 13 Page - Shanghai awinic technology co.,ltd |
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AW9136 Datasheet(HTML) 13 Page - Shanghai awinic technology co.,ltd |
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13 / 46 page  AW9136 June. 2018 V1.2 www.awinic.com.cn 13 Copyright © 2012 SHANGHAI AWINIC TECHNOLOGY CO., LTD b) Master device sends slave address (7-bit) and the data direction bit (w = 0). c) Slave device sends acknowledge signal if the slave address is correct. d) Master sends control register address (8-bit) e) Slave sends acknowledge signal f) Master generates STOP condition followed with START condition or REPEAT START condition g) Master device sends slave address (7-bit) and the data direction bit (r = 1). h) Slave device sends acknowledge signal if the slave address is correct. i) Slave sends data high 8Bit from addressed register. j) Master sends acknowledge signal k) Slave sends data low 8Bit from addressed register. l) If the master device sends acknowledge signal, the slave device will increase the control register address by one, then send the next data from the new addressed register. If master sends no acknowledge signal, the slave device stop to send data and wait for STOP condition. m) If the master device generates STOP condition, the read cycle is ended. 0 A2 A1 A0 A6 A5 A3 A4 A4 A3 A1 A2 A7 A5 A6 1 2 3 4 5 6 7 8 0 1 2 3 4 5 6 A4 A3 A1 A2 A0 A5 A6 D14 D8 D9 A0 D15 7 0 1 2 3 4 5 6 7 8 0 1 ... 6 SCL SDA Ack Ack Ack 7 8 Ack Start R/W …… I 2C Address Register Address I 2C Address Register Data High 8Bit 8 RS Using Repeat start A4 A3 A1 A2 A5 A6 D14 D8 D9 A0 D15 0 1 2 3 4 5 6 7 8 0 1 ... 6 Ack 7 8 Ack …… Stop Register Data High 8Bit S Separated Read/write transaction …… …… …… I 2C Address P …… …… R/W R/W D6 D0 D1 D7 0 1 ... 6 7 8 Ack …… Stop Register Data Low 8Bit D6 D0 D1 D7 0 1 ... 6 7 8 Ack …… Register Data Low 8Bit Figure 10 AW9136 I2C Read Timing 9.4 OSCILLATOR AW9136 has an internal OSC for Capacitive touch module and LED driver module. GCR.SENE=1 can enable capacitive touch mode and GCR.LENE=1 can enable LED driver. The OSC start work and the start-up time is about 5 us. When GCR.SENE=0 & GCR.LEDE=0, the OSC module stops. 9.5 CAPACITIVE TOUCH DETECTION AW9136 with self capacitive touch SIGMA-DELTA CDC detects the difference of capacitive sensor and judges the finger touch or not. Typically the key capacitance consist of the sensing electrode and GND without finger touching. When the finger with a conductive characteristics approaches, finger-Media-PCB constitute a parallel plate capacitor and the key capacitance parallel capacitor on the parasitic capacitance, resulting in buttons increasing capacitance. In general, because of the difference of electrode size and dielectric materials, the capacitive value of finger input is about 0.5pF～5pF. |
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