ST72321R6 STMicroelectronics, ST72321R6 Datasheet - Page 100

• Manufacturer Part Number: ST72321R6
• Description: 8-BIT MCU WITH NESTED INTERRUPTS, FLASH,10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE
• Manufacturer: STMicroelectronics

Specifications of ST72321R6

• Hdflash Endurance: 100 cycles, data retention
• Clock Sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system and bypass for external clock
• Four Power Saving Modes: Halt, Active-Halt,Wait and Slow
• Main Clock Controller With: Real time base, Beep and Clock-out capabilities
• Two 16-bit Timers With: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes
• 8-bit Pwm Auto-reload Timer With: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

ST72321Rx ST72321ARx ST72321Jx
SERIAL COMMUNICATIONS INTERFACE (Cont’d)
Figure 60. SCI Block Diagram
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TDO
RDI
TIE
CR2
TRANSMITTER
INTERRUPT
TCIE
CONTROL
CLOCK
f
CPU
Transmit Data Register (TDR)
SCI
TRANSMIT
CONTROL
RIE
Transmit Shift Register
Write
ILIE
/16
TE
RE
/PR
RWU
WAKE
UNIT
UP
R8
SBK
T8
CONVENTIONAL BAUD RATE GENERATOR
SCP1
Received Data Register (RDR)
SCID
Read
SCP0 SCT2 SCT1 SCT0 SCR2 SCR1SCR0
Received Shift Register
TDRE TC RDRF IDLE OR
TRANSMITTER RATE
M
CONTROL
WAKE
RECEIVER
CONTROL
(DATA REGISTER) DR
PCE PS
RECEIVER RATE
CONTROL
CR1
PIE
NF
BRR
RECEIVER
FE
CLOCK
PE
SR