R8CSLASH29 datasheet(274/471 Pages) RENESAS

274 / 471 page

R8C/28 Group, R8C/29 Group

16. Clock Synchronous Serial Interface

Rev.2.10

Sep 26, 2008

Page 257 of 441

REJ09B0279-0210

Figure 16.7

SSMR2 Register

SS Mode Register 2

Symbol

Address

After Reset

SSMR2

00BDh

00h

Bit Symbol

Bit Name

Function

SCS

_____

pin open drain output

0 : CMOS output

select bit

1 : N-channel open drain output

SCS

_____

pin select bits(2)

b5 b4

0 0 : Functions as port

0 1 : Functions as SCS

_____

input pin

1 0 : Functions as SCS

_____

output pin(3)

1 1 : Functions as SCS

_____

output pin(3)

NOTES:

Refer to 16.2.2.1 Association betw een Data I/O Pins and SS Shift Register for information on combinations of

data I/O pins.

The SCS

_____

pin functions as a port, regardless of the values of bits CSS0 and CSS1 w hen the SSUMS

SCKS

SSCK pin select bit

0 : Functions as port

1 : Functions as serial clock pin

b3 b2 b1

b7 b6 b5 b4

SOOS

SCKOS

SSUMS

CSOS

0 : Clock synchronous communication mode

1 : Four-w ire bus communication mode

SSCK pin open drain output

select bit

0 : CMOS output

1 : N-channel open drain output

CSS1

Clock synchronous serial I/O w ith

chip select mode select bit(1)

Serial data pin open output drain

select bit(1)

0 : CMOS output(5)

1 : N-channel open drain output

CSS0

The SSI pin and SSO pin corresponding port direction bits are set to 0 (input mode) w hen the SOOS bit is set to 0

(CMOS output).

The BIDE bit is disabled w hen the SSUMS bit is set to 0 (clock synchronous communication mode).

BIDE

Bidirectional mode enable bit(1, 4)

0 : Standard mode (communication using 2

pins of data input and data output)

1 : Bidirectional mode (communication using

1 pin of data input and data output)

This bit functions as the SCS

_____

input pin before starting transfer.

bit is set to 0 (clock synchronous communication mode).

R8C/29 Datasheet(PDF) 274 Page - Renesas Technology Corp

R8C/29 Datasheet(HTML) 274 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