7733 datasheet(441/940 Pages) RENESAS

441 / 940 page

APPLICATIONS

7733 Group User’s Manual

17–34

(2) Initial settings for related registers

Fig. 17.2.11 Initial settings for related registers

17.2 Serial I/O

X: It may be “0” or “1.”

When the system clock (main clock) frequency = 16 MHz,

baud rate = 9,600 bps

UART1 baud rate register (BRG1) (address 39 16)

3316

UART1 transmit/receive control register 1 (address 3D 16)

Transmission is enabled.

Reception is enabled.

XX 1 X 1

Pin RXD1: Input mode

Port P8 direction register (address 14 16)

UART mode (Transfer data length = 8 bits)

UART1 transmit/receive mode register (address 38 16)

Internal clock is selected.

1 0 1

1 stop bit

Parity is disabled.

Sleep mode is invalid.

Must be fixed to “0.”

BRG1 count source: f 2

UART1 transmit/receive control register 0 (address 3C 16)

RTS

function is selected.

0X 1 0 0

CTS

/RTS function is enabled.

Pin TXD1’s output structure: CMOS output

UART1 transmission interrupt control register (address 73 16)

Interrupt priority level is set. (Note that a value other than “000 2” is set.)

Interrupt request bit: 0 (Initialized)

UART1 receive interrupt control register (address 74 16)

Interrupt request bit: 0 (Initialized)

Interrupt disable flag (I)

“0”: Interrupt is enabled.

Interrupt priority level is set. (Note that a value other than “000 2” is set.)

7733 Datasheet(PDF) 441 Page - Renesas Technology Corp