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RX21A

Microcontroller incorporating a 24-bit ΔΣ A/D converter for measuring instruments including smart meters

 

The RX21A group is the product that 24-bit Delta-sigma ADC is built in for measuring instruments such as a smart meter.
PGA (Programmable Gain Amp) is built in Delta-sigma ADC, which is possible to amplify analog signal at most 64 times.
The RX21A group has peripheral functions with special features, such as RTC which enables Time capture on event-signal input through external pins and DEU (Data Encryption Unit) which enables to use Encryption/decryption functions of the AES standard.

 

Key Features:

ITEM RX21A
CPU core RX CPU General registers: 32-bit x 16
Multiplier: 32-bit multiplier Divider: Yes
Multiply-accumulator: Yes (two types: memory-to-memory operations and register-to-register operations)
Memory-protection unit (MPU)
Maximum operating frequency 50 MHz
Power supply voltage 1.8 to 3.6 V
Program Flash max. 512 KB
Data Flash 8 KB
SRAM max. 64 KB
On-chip peripheral functions Transfer functions DMA controller (DMACA): 4 channels
Data transfer controller (DTCa)
Timers Multi-function timer pulse unit 2: 16 bits x 6 channels (MTU2a)
Port output enable 2 (POE2a)
8-bit timer (TMR): 8 bits x 2 channels x 2 units
Compare match timer (CMT): 16 bits x 2 channels x 2 units
Watchdog timer (WDTA): 14 bits
Realtime clock (RTCb)
Communication functions Serial communications interface (SCIc): 5 channels (1ch: IrDA x 1channel)
I2C bus interface (RIIC): 100, 80-pin:2 channels; 64-pin: 1 channel
Serial peripheral interface (RSPI): 2 channels
Analog functions 24-bit Delta-sigma A/D converter (DSAD): 100-pin: 7 channels; 80-pin: 4 channels; 64-pin: 3 channels
10-bit A/D converter (AD): 100, 80-pin: 7 channels; 64-pin: 4 channels
10-bit D/A converter (DA): 100, 80-pin: 2 channels; 64-pin: none
ComparatorA (CMPA): 100, 80-pin: 2 channels;, 64-pin: 1 channel
ComparatorB (CMPB): 2 channels
Encryption functions Data Encryption Unit (DEU)
Safety functions Clock Frequency Accuracy Measurement Circuit (CAC)
Data Operation Circuit (DOC)
Independent watchdog timer (IWDTa): 14 bits
Self-diagnosis Function of 10-bit ADC/AD Input Disconnection
Detection CRC Calculator (CRC)
Clock Generation Circuit Main clock oscillator
Sub-clock oscillator
Low-speed on-chip oscillator (LOCO)
High-speed on-chip oscillator (HOCO)
PLL frequency synthesizer
Dedicated on-chip oscillator for the IWDT
Others Event link controller (ELC)
Multifunction Pin Controller (MPC)
Temperature Sensor (TEMPSa)

Power-on reset Circuit (POR)

Voltage Detection Circuit (LVD)
On-chip debugging function Planning
Low power consumption modes 4 modes
Sleep mode
All-module clock stop mode
Software standby mode
Deep software standby mode
Packages PLQP0064KB-A (64-pin LFQFP,10x10mm,0.5mm pitch)
PLQP0080KB-A (80-pin LFQFP,12x12mm,0.5mm pitch)
PLQP0100KB-A (100-pin LFQFP,14x14mm,0.5mm pitch)
PTLG0100JA-A(100-pin TFLGA,7x7mm,0.65mm pitch)

 

Pin Count / Memory Size Lineup:

RX21A-Pin Count/Memory Size

 

Block Diagram:

RX21A Block Diagram

Below you will find information to support the development of your application.
You can find an explanation of orderable part numbers here.

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