M16CSLASH29 datasheet(198/499 Pages) RENESAS

198 / 499 page

14.Serial I/O

page 174

Figure 14.4 U0TB to U2TB, U0RB to U2RB, U0BRG to U2BRG Registers

(b15)

(b8)

UARTi Transmit Buffer Register (i=0 to 2)(1)

Function

Transmit data

Nothing is assigned. If necessary, set to 0.

When read, their contents are undefined

Symbol

Address

After Reset

U0TB

03A316-03A216

Undefined

U1TB

03AB16-03AA16

Undefined

U2TB

037B16-037A16

Undefined

NOTES:

1. Use MOV instruction to write to this register.

UARTi Baud Rate Generation Register (i=0 to 2)(1, 2, 3)

Symbol

Address

After Reset

U0BRG

03A116

Undefined

U1BRG

03A916

Undefined

U2BRG

037916

Undefined

Function

Assuming that set value = n, UiBRG divides

the count source by n + 1

Setting Range

NOTES:

1. Write to this register while serial I/O is neither transmitting nor receiving.

2. Use MOV instruction to write to this register.

The transfer clock is shown below when the setting value in the UiBRG register is set as n.

(1) When the CKDIR bit in the UiMR register to 0 (internal clock)

• Clock synchronous serial I/O mode

: fj/(2(n+1))

• Clock asynchronous serial I/O (UART) mode : fj/(16(n+1))

(2) When the CKDIR bit in the UiMR register to 1 (external clock)

• Clock synchronous serial I/O mode

: fEXT

• Clock asynchronous serial I/O (UART) mode : fEXT/(16(n+1))

fj : f1SIO, f2SIO, f8SIO, f32SIO

fEXT : Input from CLKi pin

3. Set the UiBRG register after setting bits CLK1 and CLK0 in the registers UiC0.

(b15)

Symbol

Address

After Reset

U0RB

03A716-03A616

undefined

U1RB

03AF16-03AE16

undefined

U2RB

037F16-037E16

undefined

(b8)

UARTi Receive Buffer Register (i=0 to 2)

Function

Bit Name

Bit

Symbol

0 : No framing error

1 : Framing error found

0 : No parity error

1 : Parity error found

0 : No error

1 : Error found

OER

FER

PER

SUM

Overrun error flag(1)

Framing error flag(1)

Parity error flag(1)

Error sum flag (1)

0 : No overrun error

1 : Overrun error found

ABT

Arbitration lost

detecting flag (2)

0 : Not detected

1 : Detected

(b7-b0)

(b10-b9)

(b8)

Nothing is assigned. If necessary, set to 0.

When read, their contents are undefined

0016 to FF16

Receive data (D8)

Receive data (D7 to D0)

NOTES:

1. When the SMD2 to SMD0 bits in the UiMR register are set to 0002 (serial I/O disabled) or the RE bit in the UiC1 register is set to

0 (reception disabled), all bits SUM, PER, FER and OER are set to 0 (no error). The SUM bit is set to 0 (no error) when all of the

PER, FER and OER bits are set to 0 (no error). Also, bits PER and FER are set to 0 by reading the lower byte of the UiRB

2. The ABT bit is set to 0 by setting to 0 by program. (Writing 1 has no effect.) Nothing is assigned at the bit 11 in the U0RB and

U1RB registers. If necessary, set to 0. When read, its content is 0.

M16C/29 датащи(PDF) 198 Page - Renesas Technology Corp

M16C/29 датащи(HTML) 198 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

датащи скачать

ссылки URL