ST72334J(2003) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72334J
(Rev.:2003)

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES

STMicroelectronics 

ST72334J/N, ST72314J/N, ST72124J

SERIAL COMMUNICATIONS INTERFACE (Cont’d)

EXTENDED RECEIVE PRESCALER DIVISION EXTENDED TRANSMIT PRESCALER DIVISION

REGISTER (ERPR)

REGISTER (ETPR)

Read/Write

Read/Write

Reset Value: 0000 0000 (00 h)

Reset Value:0000 0000 (00h)

Allows setting of the Extended Prescaler rate divi- Allows setting of the External Prescaler rate divi-

sion factor for the receive circuit.

sion factor for the transmit circuit.

7

0

ERPR ERPR ERPR ERPR ERPR ERPR ERPR ERPR

7

6

5

4

3

2

1

0

7

0

ETPR ETPR ETPR ETPR ETPR ETPR ETPR ETPR

7

6

5

4

3

2

1

0

Bit 7:1 = ERPR[7:0] 8-bit Extended Receive Pres-

caler Register.

The extended Baud Rate Generator is activated

when a value different from 00h is stored in this

register. Therefore the clock frequency issued

from the 16 divider (see Figure 3.) is divided by the

binary factor set in the ERPR register (in the range

1 to 255).

The extended baud rate generator is not used af-

ter a reset.

Bit 7:1 = ETPR[7:0] 8-bit Extended Transmit Pres-

caler Register.

The extended Baud Rate Generator is activated

when a value different from 00h is stored in this

register. Therefore the clock frequency issued

from the 16 divider (see Figure 3.) is divided by the

binary factor set in the ETPR register (in the range

1 to 255).

The extended baud rate generator is not used af-

ter a reset.

Table 18. SCI Register Map and Reset Values

Address Register

(Hex.)

Label

0050h

0051h

SCISR

Reset Value

SCIDR

Reset Value

0052h

0053h

0054h

0055h

0057h

SCIBRR

Reset Value

SCICR1

Reset Value

SCICR2

Reset Value

SCIPBRR

Reset Value

SCIPBRT

Reset Value

7

TDRE

1

MSB

x

SOG

0

R8

x

TIE

0

MSB

0

MSB

0

6

TC

1

x

0

T8

x

TCIE

0

0

0

5

4

3

2

1

0

RDRF

0

x

VPOL

x

0

RIE

0

0

0

IDLE

0

x

2FHDET

x

M

x

ILIE

0

0

0

OR

NF

FE

0

0

0

x

x

x

HVSEL VCORDIS CLPINV

x

x

x

WAKE

x

0

0

TE

RE

RWU

0

0

0

0

0

0

0

0

0

0

LSB

x

BLKINV

x

0

SBK

0

LSB

0

LSB

0

96/153

Share Link: