st52f513 STMicroelectronics, st52f513 Datasheet - Page 86

• Manufacturer Part Number: st52f513
• Description: 8-bit Microcontrollers
• Manufacturer: STMicroelectronics

ST52510xx ST52513xx
13.4 SCI Register Description
The following registers are related to the use of the
SCI peripheral.
13.4.1 SCI Configuration Registers.
SCI Control Register 1 (
Configuration Register 22 (016h) Read/Write
Reset Value: 0000 0000 (00h)
Bit 7: RXFINT SCDR_RX buffer full interrupt mask
Bit 6: OVRINT Overrun interrupt mask
Bit 5: BRKINT Break interrupt mask
Bit 4: TXEMINT SCDR_TX buffer empty interrupt
Bit 3: TXENINT TX end interrupt mask
Bit 2: PAR/T8 Parity type selection or TX 9th bit
Bit 1-0: FRM Frame type selection
Note: the SCI interrupts are not enabled unless the
bit 3 (MSKSCI) of the Configuration Register 0
(INT_MASK) is enabled (set to 1).
86/136
RXFINT OVRINT BRKINT TXEMINTTXENINT PAR/T8
7
0: interrupt disabled
1: interrupt enabled
0: interrupt disabled
1: interrupt enabled
0: interrupt disabled
1: interrupt enabled
0: interrupt disabled
1: interrupt enabled
0: interrupt disabled
1: interrupt enabled
0: parity odd if enabled, else TX 9th bit=0
1: parity even if enabled, else TX 9th bit=1
00: 8 bit, no parity, 1 stop bit
01: 8 bit, no parity, 2 stop bit
10: 8 bit, parity, 1 stop bit
11: 9 bit, no parity, 1 stop bit
SCI_CR1
)
2
FRM
0
SCI Control Register 2 (
Configuration Register 23 (017h) Read/Write
Reset Value: 0000 0000 (00h)
Bit 7-4: PRESC_H Baud Rate prescaler (bit 11:8)
Bit 3-2: not used
Bit 1: RXSTRT Reception enable
Bit 0: TXSTRT Transmission enable
SCI Control Register 3 (
Configuration Register 43 (02Bh) Read/Write
Reset Value: 0000 0000 (00h)
Bit 7-0: PRESC_L Baud Rate prescaler (bit 7:0)
7
7
0: RX disabled
1: RX enabled
0: TX disabled
1: TX enabled
These bits are the higher part of the
prescaler (see SCI_CR3 Configuration
Register) which determinates the baud rate
of the communication, according to
13.1
Paragraph
These bits are the lower part of the
prescaler (see SCI_CR2 Configuration
Register) which determinates the baud rate
of the communication, according to
13.1
Paragraph
PRESC_H
and
and
13.3.
13.3.
Table
Table
4
PRESC_L
SCI_CR2
SCI_CR3
13.2, as explained in
13.2, as explained in
-
)
)
2
RXSTRT TXSTRT
Table
Table
0
0