ST STM32L1 Series Application Note page 18

Peripheral migration
Table 8. Peripheral compatibility analysis STM32L1 Series versus STM32L4 Series (continued)
Nb
Nb
inst.
Peripheral inst.
Cat.
in L1
2/4
DMA 1
TIM 9
Basic 2
General P. 7
Advanced -
Low-power -
SDIO 1
FSMC/
1 1/0
FMC
PWR 1
RCC 1
USART 3
2/0
UART 2
1 (LP)
I2C 2
DAC 2
ADC 1 3/1
RTC 1
FLASH 1
Up to
Up to
GPIO 115
114/8
IOs
3 IOs
LCD glass 1
COMP 2
SYSCFG 1
AES 1
18/58
(migrating from STM32L1 Series to STM32L4 Series)
Software
2 Full Compatibility
13
2
7/3 Full Compatibility
2/1
2
1 Full Compatibility
Full Compatibility
1 Partial compatibility
1 Partial compatibility
3 Partial compatibility
Partial compatibility
3 No compatibility
2 Partial compatibility
No compatibility
1 Partial compatibility
1 No compatibility
Full compatibility
1 Full compatibility
2 No compatibility
1 Partial compatibility
1 Full compatibility
Compatibility
Pinout
NA
Partial compatibility
Partial compatibility Some pins not mapped on same GPIO.
Full Compatibility
NA
NA
Full Compatibility
Full Compatibility
Full Compatibility
Full Compatibility
Partial compatibility
Full Compatibility
NA
Partial compatibility
Partial compatibility
Partial compatibility Some pins mapped on different GPIOs.
NA
NA
DocID027094 Rev 3
Comments
Same features.
DMA mapping request may differ (see
Section 4.3: DMA).
Some pins not mapped on same GPIO.
Timer instance name may differ.
Internal connections may differ.
Only SRAM/NOR supported in STM32L1
Series.
NAND supported in STM32L4 Series.
-
-
Additional features in STM32L4 Series.
Additional features in STM32L4 Series.
Additional LPUART in STM32L4 Series.
Additional features in STM32L4 Series.
Additional features in STM32L4 Series.
SW compatible except for output buffer
management.
Additional features in STM32L4 Series.
Some pins mapped on different GPIOs.
Additional features in STM32L4 Series.
Can be powered by VBAT in STM32L4
Series.
New peripheral.
at Reset, STM32L1 Series configured in
input floating mode, STM32L4 Series in
analog mode.
A few changes mentioned in
Hardware migration.
VLCD muxed on PC3 GPIO.
SEG21 not mapped on same GPIO.
Additional features in STM32L4 Series.
-
Additional features in STM32L4 Series.
AN4612
Section 2: