sta8088ex STMicroelectronics, sta8088ex Datasheet - Page 22

• Manufacturer Part Number: sta8088ex
• Description: High Flexible Gps/galileo/glonass/qzss Receiver With Powerful Processing Arm9
• Manufacturer: STMicroelectronics

General description
3.4.5
3.4.6
3.4.7
3.4.8
Note:
3.4.9
3.4.10
3.4.11
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I
STA8088EX includes an I
SDMMC
STA8088EX features two SD/MMC interfaces. One 52 MHz/ 8-bit (iNand Interfaces) and
one 52 MHz/ 4bit (SD card interface)
MTU
The Multi Timer Unit provides access to four interrupt generating programmable 32-bit Free-
Running decrementing Counters (FRCs). The FRCs have their own clock input, allowing the
counters to run from a much slower clock than the system clock.
The FRC is the part of the timer that performs the counting. There are four instantiations of
the FRC block in the MTU, allowing four counts to be performed in parallel. The 32-bit
counter in the FRC is split up into two 16-bit counters.
WDT
Watchdog Timer (WDT) provides a way of recovering from software crashes. The watchdog
clock is used to generate a regular interrupt (WDOGINT), depending on a programmed
value.
The watchdog monitors the interrupt and asserts a reset signal (WDOGRES) if the interrupt
remains unserviced for the entire programmed period. You can enable or disable the
watchdog unit as required.
The WDT is counting down at a fixed frequency of 32.768 kHz, in NORMAL, SLOW and
DOZE modes, but is stopped in SLEEP modes.
Watchdog is stalled when the ARM processor is in Debug mode.
GPIO
GPIO block provides up to sixty-four (64) programmable inputs or outputs. Each input or
output can be controlled in two modes:
●
●
Any GPIO input can be independently enabled or disabled (masked) for interrupt
generation. User can select for each GPIO which edge (rising, falling, both) triggers an
interrupt.
ADC
10-bit SAR ADC operating at1.8 V analog supply. It can convert up to 8 single ended
channels with analog input multiplexer at 500KSPS
RTC
This is an always-on power domain dedicated to RTC logic (backup system) with 8 Kbyte
SRAM and supplied with a dedicated voltage regulator. The RTC provides a high resolution
clock which can be used for GPS. It keeps the time when the system is inactive and can be
2
C
Software mode through an APB bus interface
Alternate mode, where GPIO becomes a peripheral input or output
2
C interface configurable as master or slave.
Doc ID 18357 Rev 1
STA8088EX