ST72334J4TC View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72334J4TC

8-bit MCU for automotive with single voltage Flash/ROM memory, ADC, 16-bit timers, SPI, SCI interfaces

STMicroelectronics 

ST72334xx-Auto, ST72314xx-Auto, ST72124Jx-Auto

MISCELLANEOUS REGISTERS (Cont’d)

MISCELLANEOUS REGISTER 2 (MISCR2)

Read / Write

Reset Value: 0000 0000 (00h)

7

0

-

- BC1 BC0 -

- SSM SSI

Bit 7:6 = Reserved Must always be cleared

Bit 5:4 = BC[1:0] Beep control

These 2 bits select the PF1 pin beep capability.

Beep mode with fOSC=16MHz

Off

BC1 BC0

00

~2 kHz

~1 kHz

~500 Hz

Output

Beep signal

~50% duty cycle

01

10

11

The beep output signal is available in Active Halt

mode but has to be disabled to reduce the con-

sumption.

Bit 3:2 = Reserved Must always be cleared

Bit 1 = SSM SS mode selection

It is set and cleared by software.

0: Normal mode - SS uses information coming

from the SS pin of the SPI.

1: I/O mode, the SPI uses the information stored

into bit SSI.

Bit 0 = SSI SS internal mode

This bit replaces pin SS of the SPI when bit SSM is

set to 1. (see SPI description). It is set and cleared

by software.

Table 11. Miscellaneous Register Map and Reset Values

Address

(Hex.)

Register

Label

7

6

5

4

3

2

1

0

0020h

MISCR1

Reset Value

IS11

0

IS10

0

MCO

0

IS21

0

IS20

0

CP1

0

CP0

SMS

0

0

0040h

MISCR2

Reset Value

0

BC1

BC0

0

0

0

0

SSM

SSI

0

0

0

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