S3C72B9 View Datasheet(PDF) - Samsung

Part Name

Description

MFG CO.

S3C72B9

The S3C72B5/C72B7/C72B9 single-chip CMOS microcontroller has been designed for high performance using Samsung's newest 4-bit CPU core, SAM47

Samsung 

S3C72B5/C72B7/C72B9/P72B9

PRODUCT OVERVIEW

SERIAL I/O INTERFACE

The serial I/O interface supports the transmission or reception of 8-bit serial data with an external device. The

serial interface has the following functional components:

— 8-bit mode register

— Clock selector circuit

— 8-bit buffer register

— 3-bit serial clock counter

The serial I/O circuit can be set either to transmit-and-receive or to receive-only mode. MSB-first or LSB-first

transmission is also selectable. The serial interface operates with an internal or an external clock source, or using

the clock signal generated by the 16-bit timer/counter. To modify transmission frequency, the appropriate bits in

the serial I/O mode register (SMOD) must be manipulated.

COMPARATOR

Port 4 can be used as a analog input port for a comparator. The reference voltage for the 3-channel comparator

can be supplied either internally or externally at P4.2. The comparator module has the following components:

— Comparator

— Internal reference voltage generator (4-bit resolution)

— External reference voltage source at P4.2

— Comparator mode register (CMOD)

— Comparison result register (CMPREG)

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