Datasheet

RL78/L12

CHAPTER 31 ELECTRICAL SPECIFICATIONS (G: TA = -40 to +105°C)

R01UH0330EJ0200 Rev.2.00 946

Dec 13, 2013

Notes 1. Transfer rate in the SNOOZE mode : MAX. 1 Mbps

2. 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.

3. 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.

4. 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 (V

DD tolerance

(32- to 52-pin products)/EV

DD tolerance (64-pin products)) mode for the SOp pin by using port input

mode register g (PIMg) and port output mode register g (POMg). For VIH and VIL, see the DC

characteristics with TTL input buffer selected.

CSI mode connection diagram (during communication at different potential)

User's device

<Slave

SCKp

SOp

SCK

SIp

RL78

microcontroller

Remarks 1. R

b[Ω]:Communication line (SOp) pull-up resistance,

b[F]: Communication line (SOp) load capacitance, Vb[V]: Communication line voltage

2. p: CSI number (p = 00, 01), m: Unit number (m = 0), n: Channel number (n = 0, 1),

g: PIM and POM number (g = 1)

3. f

MCK: Serial array unit operation clock frequency

(Operation clock to be set by the serial clock select register m (SPSm) and the CKSmn bit of serial mode