RL78 datasheet(82/100 Pages) RENESAS

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RL78/G14

2. ELECTRICAL SPECIFICATIONS

R01DS0053EJ0100 Rev. 1.00

Page 82 of 97

Feb 21, 2012

Caution

The pins mounted depend on the product. Refer to 1.3.1 30-pin products to 1.3.10 100-pin products.

CSI mode connection diagram (during communication at different potential)

Note 1.

Transfer rate in the SNOOZE mode: MAX. 1 Mbps

Note 2.

Use it with EVDD0

 Vb.

Note 3.

When DAPmn = 0 and CKPmn = 0, or DAPmn = 1 and CKPmn = 1. The SIp setup time becomes “to SCKp

↓” when

DAPmn = 0 and CKPmn = 1, or DAPmn = 1 and CKPmn = 0.

Note 4.

When DAPmn = 0 and CKPmn = 0, or DAPmn = 1 and CKPmn = 1. The SIp hold time becomes “from SCKp

↓” when

DAPmn = 0 and CKPmn = 1, or DAPmn = 1 and CKPmn = 0.

Note 5.

When DAPmn = 0 and CKPmn = 0, or DAPmn = 1 and CKPmn = 1. The delay time to SOp output becomes “from

SCKp

↑” when DAPmn = 0 and CKPmn = 1, or DAPmn = 1 and CKPmn = 0.

Caution

Select the TTL input buffer for the SIp pin and SCKp pin and the N-ch open drain output (EVDD0 tolerance) mode

for the SOp pin by using port input mode register g (PIMg) and port output mode register g (POMg).

Remark 1. Rb[

]: Communication line (SOp) pull-up resistance, Cb[F]: Communication line (SOp) load capacitance,

Vb[V]: Communication line voltage

Remark 2.

p: CSI number (p = 00, 01, 10, 20, 30, 31), m: Unit number (m = 0, 1), n: Channel number (n = 0 to 3),

g: PIM and POM number (g = 0, 1, 3 to 5, 14)

Remark 3.

fMCK: Serial array unit operation clock frequency

(Operation clock to be set by the CKSmn bit of serial mode register mn (SMRmn).

m: Unit number, n: Channel number (mn = 00, 02, 10))

Remark 4.

VIH and VIL below are observation points for the AC characteristics of the serial array unit when communicating at

different potentials in CSI mode.

4.0 V

 EVDD0  5.5 V, 2.7 V  Vb  4.0 V: VIH = 2.2 V, VIL = 0.8 V

2.7 V

 EVDD0 < 4.0 V, 2.3 V  Vb  2.7 V: VIH = 2.0 V, VIL = 0.5 V

1.8 V

 EVDD0 < 3.3 V, 1.6 V  Vb  2.0 V: VIH = 1.50 V, VIL = 0.32 V

Remark 5.

CSI01 of 48-, 52-, 64-pin products, and CSI11 and CSI21 cannot communicate at different potential. Use other CSI for

communication at different potential.

Also, communication at different potential cannot be performed during clock synchronous serial communication with the

slave select function.

SCKp

SOp

User’s device

SCK

SIp

<Slave>

RL78/G14

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