STM32L162XE Datasheet, PDF (27/129 Pages) STMicroelectronics – Ultra-low-power platform

STM32L162xE
Functional overview
algorithm (compatible with FIPS PUB 197, 2001 Nov 26).
• Key scheduler
• Key derivation for decryption
• 128-bit data block processed
• 128-bit key length
• 213 clock cycles to encrypt/decrypt one 128-bit block
• Electronic codebook (ECB), cypher block chaining (CBC), and counter mode (CTR)
supported by hardware.
AES data flow can be served by 2ch (D_IN/D_OUT) of the DMA2 controller
3.17
Timers and watchdogs
The ultra-low-power STM32L162xE devices include seven general-purpose timers, two
basic timers, and two watchdog timers.
Table 6 compares the features of the general-purpose and basic timers.
Table 6. Timer feature comparison
Timer
Counter
resolution
Counter type
Prescaler factor
DMA
request
generation
Capture/compare
channels
Complementary
outputs
TIM2,
TIM3,
TIM4
16-bit
Up, down,
up/down
Any integer between
1 and 65536
Yes
4
No
TIM5 32-bit
Up, down,
up/down
Any integer between
1 and 65536
Yes
4
No
TIM9 16-bit
Up, down,
up/down
Any integer between
1 and 65536
No
2
No
TIM10,
TIM11
16-bit
Up
Any integer between
1 and 65536
No
1
No
TIM6,
TIM7
16-bit
Up
Any integer between
1 and 65536
Yes
0
No
3.17.1
General-purpose timers (TIM2, TIM3, TIM4, TIM5, TIM9, TIM10 and
TIM11)
There are seven synchronizable general-purpose timers embedded in the STM32L162xE
devices (see Table 6 for differences).
TIM2, TIM3, TIM4, TIM5
TIM2, TIM3, TIM4 are based on 16-bit auto-reload up/down counter. TIM5 is based on a 32-
bit auto-reload up/down counter. They include a 16-bit prescaler. They feature four
independent channels each for input capture/output compare, PWM or one-pulse mode
output. This gives up to 16 input captures/output compares/PWMs on the largest packages.
TIM2, TIM3, TIM4, TIM5 general-purpose timers can work together or with the TIM10,
TIM11 and TIM9 general-purpose timers via the Timer Link feature for synchronization or
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