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RL78/D1A User's Manual: Hardware - Renesas

RL78/D1A User's Manual: Hardware - Renesas

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Under development<br />

Preliminary document<br />

Specifications in this document are tentative and subject to change.<br />

<strong>RL78</strong>/<strong>D1A</strong> CHAPTER 12 SERIAL ARRAY UNIT<br />

(4) Processing flow (in continuous transmission/reception mode)<br />

Figure 12-48. Timing Chart of Master Transmission/Reception (in Continuous Transmission/Reception Mode)<br />

(Type 1: DAPmn = 0, CKPmn = 0)<br />

SSmn<br />

STmn<br />

SEmn<br />

SDRmn<br />

SCKp pin<br />

SIp pin<br />

Shift<br />

register mn<br />

SOp pin<br />

INTCSIp<br />

MDmn0<br />

TSFmn<br />

BFFmn<br />

Transmit data 1 Transmit data 2 Receive data 1 Transmit data 3<br />

Receive data 3<br />

Receive data 2<br />

Write Write<br />

Write<br />

Read Read Read<br />

Receive data 1 Receive data 2 Receive data 3<br />

Reception & shift operation Reception & shift operation Reception & shift operation<br />

Transmit data 1<br />

Transmit data 2<br />

Transmit data 3<br />

Data transmission/reception (8-bit length) Data transmission/reception (8-bit length) Data transmission/reception (8-bit length)<br />

<br />

<br />

<br />

(Note 1)<br />

(Note 2) (Note 2)<br />

Notes 1. When transmit data is written to the SDRmn register while BFFmn = 1, the transmit data is overwritten.<br />

2. The transmit data can be read by reading the SDRmn register during this period. At this time, the<br />

transfer operation is not affected.<br />

Caution The MDmn0 bit can be rewritten even during operation.<br />

However, rewrite it before transfer of the last bit is started, so that it has been rewritten before<br />

the transfer end interrupt of the last transmit data.<br />

Remarks 1. to in the figure correspond to to in Figure 12-49 Flowchart of Master<br />

Transmission/Reception (in Continuous Transmission/Reception Mode).<br />

2. m: Unit number (m = 0, 1), n: Channel number (n = 0, 1), p: CSI number (p = 00, 01, 10)<br />

R01UH0317EJ0004 Rev. 0.04 617<br />

Feb. 22, 2013

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