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Datasheet

Datasheet

BU21079F

TSZ02201-0Y1Y0FZ00150-1-2

© 2013 ROHM Co., Ltd. All rights reserved.

2013.09.25 Rev.001

www.rohm.com

TSZ22111・15・001

Block Diagram

Description of Blocks

Sensor AFE、C/V Converter

Converts capacitance from the sensors to voltage.

A/D

Converts the voltage from C/V Converter to digital.

LDO27

2.7V output LDO for Sensor AFE, C/V Converter and A/D.

LDO15

1.5V output LDO for OSC and digital blocks.

OSC

Ring oscillator used for the system clock.

POR

Power-On-Reset monitoring LDO15 for system reset.

MPU

Controls switch operations based on the sensing results and run Auto-calibration.

INT port informs the host that switch operations are detected.

PROM

Programmable ROM for the built-in MPU.

WRAM

Work RAM for the built-in MPU.

HOST I/F

2-wire serial bus interface compatible with I2C protocol.

AFE_CNT

Sequencer of Sensor AFE, C/V converter and A/D.

WDTR

Watchdog Timer Reset. It operates as the system resets. If MPU hangs-up, Watchdog Timer Reset can reset the IC.

Figure 6. Block Diagram