7540 datasheet(190/366 Pages) RENESAS

190 / 366 page

2-114

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

APPLICATION

7540 Group

2.6 Serial I/O1

Fig. 2.6.17 Setting method for UART of serial I/O1 (2)

b7b0

Process 5: When BRG output/16 is selected as synchronous clock, set value to baud rate generator.

Baud rate generator (BRG) [Address 1C16]

Set baud rate value

Process 4: Set UART control register.

Select character length

0: 8 bits

1: 7 bits

Select parity enable

0: Parity disabled

1: Parity enabled

Select parity (valid only when parity is enabled)

0: Even parity

1: Odd parity

Select stop bit length

0: 1 stop bit

1: 2 stop bits

Select P11/TxD P-channel output disable (in output mode)

0: CMOS output

1: N-channel open-drain output

UART control register (UARTCON) [Address 1B16]

b7b0

Process 8: When transmitting, start serial data transmission (Note).

Transmit/Receive buffer register (TB/RB) [Address 1816]

Set transmit data

Process 6: In order not to execute the no requested interrupt processing, set “0” (no requested)

to the serial I/O1 transmit/receive interrupt request bit.

Interrupt request register 1 (IREQ1) [Address 3C16]

No serial I/O1 receive interrupt request issued

No serial I/O1 transmit interrupt request issued

Serial I/O1 receive interrupt enabled

Serial I/O1 transmit interrupt enabled

Interrupt control register 1 (ICON1) [Address 3E16]

Process 7: When the interrupt is used, set “1” (interrupt enabled) to the serial I/O1

transmit/receive interrupt enable bit.

Note: When data transmission is executed at the state that an external clock input is

selected as the synchronous clock, set the transmit data while the SCLK1 is “H” state.

7540 Datasheet(PDF) 190 Page - Renesas Technology Corp

7540 Datasheet(HTML) 190 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