R8CSLASH29 datasheet(250/471 Pages) RENESAS

250 / 471 page

R8C/28 Group, R8C/29 Group

15. Serial Interface

Rev.2.10

Sep 26, 2008

Page 233 of 441

REJ09B0279-0210

Figure 15.3

Registers U0TB to U1TB and U0RB to U1RB

UARTi Transmit Buffer Register (i = 0 or 1)

(1, 2)

Symbol

Address

After Reset

U0TB

00A3h-00A2h

Undefined

U1TB

00ABh-00AAh

Undefined

NOTES:

Transmit data

Nothing is assigned. If necessary, set to 0.

When read, the content is undefined.

—

(b8-b0)

—

(b15-b9)

When the transfer data length is 9 bits, w rite data to high byte first, then low byte.

Use the MOV instruction to w rite to this register.

Function

—

(b8)

(b15)

UARTi Receive Buffer Register (i = 0 or 1)

(1)

Symbol

Address

After Reset

U0RB

00A7h-00A6h

Undefined

U1RB

00AFh-00AEh

Undefined

NOTES:

Nothing is assigned. If necessary, set to 0.

When read, the content is undefined.

—

(b11-b9)

Read out the UiRB register in 16-bit units.

Bits SUM, PER, FER, and OER are set to 0 (no error) w hen bits SMD2 to SMD0 in the UiMR register are set to 000b

(serial interface disabled) or the RE bit in the UiC1 register is set to 0 (receive disabled). The SUM bit is set to 0 (no

error) w hen bits PER, FER, and OER are set to 0 (no error). Bits PER and FER are set to 0 even w hen the higher byte

of the UiRB register is read out.

Also, bits PER and FER are set to 0 w hen reading the high-order byte of the UiRB register.

SUM

Error sum flag(2)

0 : No error

1 : Error

PER

Parity error flag(2)

0 : No parity error

1 : Parity error

FER

Framing error flag(2)

0 : No framing error

1 : Framing error

OER

Overrun error flag(2)

0 : No overrun error

1 : Overrun error

Bit Symbol

Bit Name

(b8)

(b15)

—

(b7-b0)

—

Function

Receive data (D7 to D0)

Receive data (D8)

—

(b8)

—

R8C/29 Datasheet(PDF) 250 Page - Renesas Technology Corp

R8C/29 Datasheet(HTML) 250 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