MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 692

• Manufacturer Part Number: MCBSTM32EXL
• Description: BOARD EVALUATION FOR STM32F103ZE
• Manufacturer: Keil

Specifications of MCBSTM32EXL

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Universal synchronous asynchronous receiver transmitter (USART)
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Bits 7:0 PSC[7:0]: Prescaler value
– In IrDA Low-power mode:
– In normal IrDA mode: PSC must be set to 00000001.
– In smartcard mode:
Note: 1: Bits [7:5] have no effect if Smartcard mode is used.
PSC[7:0] = IrDA Low-Power Baud Rate
Used for programming the prescaler for dividing the system clock to achieve the low-power
frequency:
The source clock is divided by the value given in the register (8 significant bits):
00000000: Reserved - do not program this value
00000001: divides the source clock by 1
00000010: divides the source clock by 2
...
PSC[4:0]: Prescaler value
Used for programming the prescaler for dividing the system clock to provide the smartcard
clock.
The value given in the register (5 significant bits) is multiplied by 2 to give the division factor
of the source clock frequency:
00000: Reserved - do not program this value
00001: divides the source clock by 2
00010: divides the source clock by 4
00011: divides the source clock by 6
...
2: This bit is not available for UART4 & UART5.
Doc ID 13902 Rev 9
RM0008