SPEAR320-2 STMicroelectronics, SPEAR320-2 Datasheet - Page 24

• Manufacturer Part Number: SPEAR320-2
• Description: IC MPU ARM9 289LFBGA
• Manufacturer: STMicroelectronics
• Series: SPEAr®r

Specifications of SPEAR320-2

• Processor Type: ARM Microprocessor
• Speed: 333MHz
• Voltage: 1.14 V ~ 3.6 V
• Mounting Type: Surface Mount
• Package / Case: 289-LFBGA
• Processor Series: SPEAr320
• Core: ARM926EJ-S
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 333 MHz
• Operating Supply Voltage: 1.2 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Data Ram Size: 8 KB
• Interface Type: I2C, UART, USB, Serial
• Number Of Programmable I/os: 102
• Number Of Timers: 4
• Program Memory Size: 32 KB
• Program Memory Type: ROM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-10843

Architecture overview
3.26
3.27
3.28
24/76
Two different modes of operation are available :
●
●
PWM timers
SPEAr320 provides 4 PWM timers.
Main features:
●
●
●
●
Watchdog timer
The ARM watchdog module consists of a 32-bit down counter with a programmable timeout
interval that has the capability to generate an interrupt and a reset signal on timing out. The
watchdog module is intended to be used to apply a reset to a system in the event of a
software failure.
RTC oscillator
The RTC provides a 1-second resolution clock. This keeps time when the system is inactive
and can be used to wake the system up when a programmed alarm time is reached. It has a
clock trimming feature to compensate for the accuracy of the 32.768 kHz crystal and a
secured time update.
Main features:
●
●
●
●
Auto-reload mode, an interrupt source is activated, the counter is automatically cleared
and then it restarts incrementing.
Single-shot mode, an interrupt source is activated, the counter is stopped and the GPT
is disabled.
Prescaler to define the input clock frequency to each timer
Programmable duty cycle from 0% to 100%
Programmable pulse length
APB slave interface for register programming
Time-of-day clock in 24 hour mode
Calendar
Alarm capability
Isolation mode, allowing RTC to work even if power is not supplied to the rest of the
device.
Doc ID 16755 Rev 4
SPEAr320