ST72345C4 STMicroelectronics, ST72345C4 Datasheet - Page 148

• Manufacturer Part Number: ST72345C4
• Description: 8-bit MCU
• Manufacturer: STMicroelectronics

Specifications of ST72345C4

• Up To 16 Kbytes Program Memory: single voltage extended Flash (XFlash) with readout and write protection, in-circuit and inapplication programming (ICP and IAP). 10K write/erase cycles guaranteed, data retention
• 256 Bytes Data Eeprom With Readout Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55 °C.
• Clock Sources: crystal/ceramic resonator oscillators, high-accuracy internal RC oscillator or external clock
• 5 Power-saving Modes: Slow, Wait, Halt, Auto-wakeup from Halt and Active-halt
• 16-bit Timer A With: 1 input capture, 1 output compares, external clock input, PWM and pulse generator modes
• 16-bit Timer B With: 2 input captures, 2 output compares, PWM and pulse generator modes

On-chip peripherals
Note:
Table 62.
148/247
Symbol
f
f
Rx
Tx
This RR factor is used only when the ERPR fine tuning factor is equal to 00h; otherwise, RR
is replaced by the (RR*ERPR) dividing factor.
Extended receive prescaler division register (SCIERPR)
Reset value: 0000 0000 (00h)
Bits 7:0 = ERPR[7:0] 8-bit Extended Receive Prescaler Register.
Extended transmit prescaler division register (SCIETPR)
Reset value:0000 0000 (00h)
Bits 7:0 = ETPR[7:0] 8-bit extended transmit prescaler register.
The extended baud rate generator is not active after a reset.
Baud rate selection
Communication
7
ERPR7
Parameter
ETPR7
frequency
The extended Baud Rate Generator is activated when a value other than 00h is stored
in this register. The clock frequency from the 16 divider (see
binary factor set in the SCIERPR register (in the range 1 to 255).
The extended baud rate generator is not active after a reset.
The extended Baud Rate Generator is activated when a value other than 00h is stored
in this register. The clock frequency from the 16 divider (see
binary factor set in the SCIETPR register (in the range 1 to 255).
7
ERPR6
ETPR6
8 MHz
f
CPU
ERPR5
ETPR5
Accuracy
Standard
~0.16%
~0.79%
vs.
Doc ID 12321 Rev 5
Conditions
ERPR4
ETPR4
TR (or RR) = 32, PR = 13
TR (or RR) = 16, PR =13
TR (or RR) = 8, PR = 13
TR (or RR) = 4, PR = 13
TR (or RR) = 16, PR = 3
TR (or RR) = 2, PR = 13
TR (or RR) = 1, PR = 13
TR (or RR) = 1, PR = 1
ETPR (or ERPR) = 35,
Read/Write
Read/Write
Conventional Mode
TR (or RR) = 128,
Extended Mode
Prescaler
PR = 13
ERPR3
ETPR3
ERPR2
ETPR2
Standard
Figure
Figure
10400
19200
38400
14400
1200
2400
4800
9600
300
ST72344xx ST72345xx
65) is divided by the
65) is divided by the
ERPR1
ETPR1
~10416.67
~19230.77
~38461.54
~14285.71
~1201.92
~2403.84
~4807.69
~9615.38
~300.48
Baud
Rate
0
ERPR0
ETPR0
0
Unit
Hz