9202 datasheet(33/175 Pages) STMICROELECTRONICS

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UPSD3254A, UPSD3254BV, UPSD3253B, UPSD3253BV

MCU MODULE DISCRIPTION

This section provides a detail description of the

MCU Module system functions and Peripherals,

including:

– Special Function Registers

– Timers/Counter

– Interrupts

–PWM

– Supervisory Function (LVD and Watchdog)

– USART

– Power Saving Modes

–I2C Bus

– On-chip Oscillator

–ADC

–I/O Ports

–USB

Special Function Registers

A map of the on-chip memory area called the Spe-

cial Function Register (SFR) space is shown in Ta-

ble 15.

Note: In the SFRs not all of the addresses are oc-

cupied. Unoccupied addresses are not implement-

ed on the chip. READ accesses to these

addresses will in general return random data, and

WRITE accesses will have no effect. User soft-

ware should write '0s' to these unimplemented lo-

cations.

Table 15. SFR Memory Map

Note: 1. Register can be bit addressing

B(1)

UISTA(1)

UIEN

UCON0

UCON1

UCON2

USTA

UADR

UDR0

ACC(1)

USCL

UDT1

UDT0

S1CON(1)

S1STA

S1DAT

S1ADR

S2CON

S2STA

S2DAT

S2ADR

PSW(1)

S1SETUP

S2SETUP

RAMBUF

DDCDAT

DDCADR

DDCCON

T2CON(1)

T2MOD

RCAP2L

RCAP2H

TL2

TH2

P4(1)

IP(1)

P3(1)

PSCL0L

PSCL0H

PSCL1L

PSCL1H

IPA

IE(1)

PWM4P

PWM4W

WDKEY

P2(1)

PWMCON

PWM0

PWM1

PWM2

PWM3

WDRST

IEA

SCON

SBUF

SCON2

SBUF2

P1(1)

P1SFS

P3SFS

P4SFS

ASCL

ADAT

ACON

TCON(1)

TMOD

TL0

TL1

TH0

TH1

P0(1)

DPL

DPH

PCON

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