7906 datasheet(420/531 Pages) RENESAS

420 / 531 page

7906 Group User’s Manual Rev.2.0

20-15

APPENDIX

Appendix 2. Control registers

8 to 0

15 to 9

Reference

11-5

UART0 transmit/receive mode register (Address 3016)

UART1 transmit/receive mode register (Address 3816)

Serial I/O mode select bits

Internal/External clock select bit

Stop bit length select bit

(Valid in UART mode)

(Note)

Odd/Even parity select bit

(Valid in UART mode when parity

enable bit = “1.”)

(Note)

Parity enable bit

(Valid in UART mode)

(Note)

Sleep select bit

(Valid in UART mode)

(Note)

b7 b6 b5 b4 b3 b2 b1 b0

Note: Bits 4 to 6 are invalid in the clock synchronous serial I/O mode. (Each may be either “0” or “1.”) Additionally, fix bit 7 to “0.”

0 0 0 : Serial I/O is invalid.

(P1 functions as a programmable I/O port.)

0 0 1 : Clock synchronous serial I/O mode

0 1 0 :

0 1 1 :

1 0 0 : UART mode (Transfer data length = 7 bits)

1 0 1 : UART mode (Transfer data length = 8 bits)

1 1 0 : UART mode (Transfer data length = 9 bits)

1 1 1 : Do not select.

b2 b1 b0

0 : Internal clock

1 : External clock

0 : One stop bit

1 : Two stop bits

0 : Odd parity

1 : Even parity

0 : Parity disabled

1 : Parity enabled

0 : Sleep mode terminated (Invalid)

1 : Sleep mode selected

Do not select.

Bit name

Bit

Function

At reset

R/W

Undefined

7 to 0

UART0 baud rate register (BRG0) (Address 3116)

UART1 baud rate register (BRG1) (Address 3916)

Any value in the range from “0016” to “FF16” can be set.

Assuming that the set value = n, BRGi divides the count source frequency by (n + 1).

Note: Writing to this register must be performed while the transmission/reception halts.

Use the MOVM (MOVMB) or STA (STAB, STAD) instruction for writing to this register.

Bit

Function

At reset

R/W

UART0 transmit buffer register (Addresses 3316, 3216)

UART1 transmit buffer register (Addresses 3B16, 3A16)

Note: Use the MOVM (MOVMB) or STA (STAB, STAD) instruction for writing to this register.

(b15)

(b8)

Transmit data is set.

Nothing is assigned.

Undefined

–

Bit

Function

At reset

R/W

Reference

11-14

Reference

11-11

7906 Datasheet(PDF) 420 Page - Renesas Technology Corp

7906 Datasheet(HTML) 420 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