BLUENRG-1 datasheet(75/173 Pages) STMICROELECTRONICS

75 / 173 page

BlueNRG-1

Functional details

DocID028866 Rev 1

75/173

Table 79: UART - CR register description: address offset UART_BASE_ADDR+0x30

Bit

Field name

Reset

Description

0x0

UART enable. This bit enables the UART.

0: UART is disabled.

1: UART is enabled. Data transmission and reception

can occur. When the UART is disabled in the middle of

transmission or reception, it completes the current

character before stopping.

2:1

RESERVED

0x0

RESERVED

OVSFACT

0x0

UART oversampling factor.This bit enables the UART

oversampling factor. If UARTCLK is 16 MHz thus max.

baud-rate is 1 Mbaud when OVSFACT = 0b, and 2

Mbaud when OVSFACT = 1b.

0: UART it is 16 UARTCLK clock cycles.

1: UART it is 8 UARTCLK clock cycles.

7:4

RESERVED

0x0

RESERVED

TXE

0x1

Transmit enable.

0b: UART TX disabled.

1b: UART TX enabled.

RXE

0x1

Receive enable.

0b: UART RX disabled.

1b: UART RX enabled.

RESERVED

0x0

RESERVED

RTS

0x0

Request to send.

0: RTS is high.

1: RTS is low.

13:12

RESERVED

0x0

RESERVED

RTSEN

0x0

RTS hardware flow control enable.

0b: RTS disabled.

1b: RTS enabled. Data is only requested when there is

space in the receive FIFO for it to be received.

CTSEN

0x0

CTS hardware flow control enable.

0b: CTS disabled.

1b: CTS enabled. Data is only transmitted when the

CTS is asserted.

19:16

STA_B_DURATION

0x4

START bit duration Receiver state. These bits can be

used to configure the START bit duration (in clock

cycles) to get the bit sampled in the middle of the

UART receiver. These bits can be used only when

using high baud rates (IBRD = 1, FBRD >= 0 and

OVSFACT = 1). Below the formula to calculate the

START bit duration receiver state:

STA_B_DURATION = Integer(Fuartclk/(2* BAUD

RATE)) - 1

Example: when UARTCLK = 16 MHz and BAUD

RATE = 2.0 Mbps then STA_B_DURATION = 4 - 1 =

3. STA_B_DURATION field should be configured with

4'b0011.

BLUENRG-1 Datasheet(PDF) 75 Page - STMicroelectronics

BLUENRG-1 Datasheet(HTML) 75 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL