ST72C334N2B6 STMicroelectronics, ST72C334N2B6 Datasheet - Page 49

• Manufacturer Part Number: ST72C334N2B6
• Description: Microcontrollers (MCU) Flash 8K SPI/SCI
• Manufacturer: STMicroelectronics

Specifications of ST72C334N2B6

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 384 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 44
• Number Of Timers: 16 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Package / Case: SDIP-56
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: No

MISCELLANEOUS REGISTERS (Cont’d)
MISCELLANEOUS REGISTER 2 (MISCR2)
Read/Write
Reset Value: 0000 0000 (00h)
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.
The beep output signal is available in ACTIVE-
HALT mode but has to be disabled to reduce the
consumption.
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
BC1 BC0
Address
0
0
1
1
7
-
(Hex.)
0020h
0040h
0
1
0
1
-
MISCR1
Reset Value
MISCR2
Reset Value
BC1
Register
Label
Beep mode with f
~500-Hz
~1-KHz
~2-KHz
BC0
IS11
-
7
0
0
Off
~50% duty cycle
OSC
-
Beep signal
=16MHz
Output
IS10
SSM
6
0
0
SSI
0
MCO
BC1
5
0
0
IS21
BC0
4
0
0
ST72334J/N, ST72314J/N, ST72124J
IS20
3
0
0
CP1
2
0
0
SSM
CP0
1
0
0
SMS
SSI
49/125
0
0
0