7477 datasheet(155/354 Pages) RENESAS

155 / 354 page

7470/7471/7477/7478 GROUP USER’S MANUAL

1-138

HARDWARE

1.13 Serial I/O

(4) UART control register (UARTCON: Address 00E316)

The UART control register controls the UART transfer data format.

Figure 1.13B.16 shows a structure of UART control register.

Fig. 1.13B.16 Structure of UART control register

Each bit of the UART control register is described below.

2 Character length selection bit (CHAS, bit 0)

This bit selects a data bit length of the UART transfer data format.

• “0”: 8-bit length

• “1”: 7-bit length

2 Parity enable bit (PARE, bit 1)

This bit selects whether a parity check is made.

• “0”: No parity check (Parity error flag is invalid.)

• “1”: Parity check (Parity error flag is valid.)

2 Parity selection bit (PARS, bit 2)

This bit selects a parity type of the UART transfer data format.

• “0”: Even

• “1”: Odd

2 Stop bit length selection bit (STPS, bit 3)

This bit selects a stop bit length of the UART transfer data format.

• “0”: 1-stop bit

• “1”: 2-stop bit

b7 b6 b5 b4 b3 b2 b1 b0

UART control register (UARTCON) [Address

At reset RW

UART control register (7477/7478 group)

Name

Function

Character length

selection bit (CHAS)

0: 8 bits

1: 7 bits

Parity enable bit

(PARE)

0: Parity checking disabled

1: Parity checking enabled

Stop bit length

selection bit (STPS)

0: 1 stop bit

1: 2 stop bits

Nothing is allocated for these bits. These are write

disabled bits. When these bits are read out, the

values are “1.”

Parity selection bit

(PARS)

0: Even parity

1: Odd parity

111 1

00E316]

7477 Datasheet(PDF) 155 Page - Renesas Technology Corp

7477 Datasheet(HTML) 155 Page - Renesas Technology Corp

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