FPU
No
Speed(MHz)
120
Flash(KB)
32
SRAM(KB)
16
I/O
23
Advanced TM(16-bit)
1
GPTM(16-bit)
5
Basic TM(16-bit)
1
IRTM
1
Systick(24-bit)
1
WDT
1
WWDT
1
RTC(Enhanced)
1
I2C
2
(F/H)I2S(1)(2)
0/2
USART/UART
2/0
ADC Engine
1
ADC (Msps)
2M
12-bit ADC ch.
10
COMP
1
PKG
QFN28
Temp.
-40~105°C
Base Part Number
AT32F421
Size
4x4
SPI
2
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