ST72C334N2B6 STMicroelectronics, ST72C334N2B6 Datasheet - Page 47

• 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

6.2 MISCELLANEOUS REGISTERS
The miscellaneous registers allow control over
several different features such as the external in-
terrupts or the I/O alternate functions.
6.2.1 I/O Port Interrupt Sensitivity Description
The external interrupt sensitivity is controlled by
the ISxx bits of the MISCR1 miscellaneous regis-
ter. This control allows to have two fully independ-
ent external interrupt source sensitivities.
Each external interrupt source can be generated
on four different events on the pin:
To guarantee correct functionality, the sensitivity
bits in the MISCR1 register must be modified only
when the I bit of the CC register is set to 1 (inter-
rupt masked). See I/O port register and Miscella-
neous register descriptions for more details on the
programming.
Falling edge
Rising edge
Falling and rising edge
Falling edge and low level
6.2.2 I/O Port Alternate Functions
The MISCR registers manage four I/O port miscel-
laneous alternate functions:
These functions are described in detail in the Sec-
tion 6.2.3 Miscellaneous Registers Description.
– SS pin internal control to use the PC7 I/O port
Main clock signal (f
A beep signal output on PF1 (with 3 selectable
audio frequencies)
SPI pin configuration:
function while the SPI is active.
ST72334J/N, ST72314J/N, ST72124J
CPU
) output on PF0
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