RL78 datasheet(72/100 Pages) RENESAS

72 / 100 page

RL78/G14

2. ELECTRICAL SPECIFICATIONS

R01DS0053EJ0100 Rev. 1.00

Page 72 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.

Note 1.

The smaller maximum transfer rate derived by using fMCK/6 or the following expression is the valid maximum transfer

rate.

Expression for calculating the transfer rate when 4.0 V

 EVDD0  5.5 V and 2.7 V  Vb  4.0 V

Note 2.

Transfer rate in the SNOOZE mode: MAX. 9600 bps, MIN. 4800 bps

Note 3.

This value as an example is calculated when the conditions described in the “Conditions” column are met.

Refer to Note 1 above to calculate the maximum transfer rate under conditions of the customer.

Note 4.

The smaller maximum transfer rate derived by using fMCK/6 or the following expression is the valid maximum transfer

rate.

Expression for calculating the transfer rate when 2.7 V

 EVDD0 < 4.0 V and 2.3 V  Vb  2.7 V

Note 5.

This value as an example is calculated when the conditions described in the “Conditions” column are met.

Refer to Note 4 above to calculate the maximum transfer rate under conditions of the customer.

Note 6.

Use it with EVDD0

 Vb.

(6)

Communication at different potential (2.5 V, 3 V) (UART mode) (dedicated baud rate generator output)

(TA = -40 to +85

C, 1.8 V  EVDD0 = EVDD1  VDD  5.5 V, VSS = EVSS0 = EVSS1 = 0 V)

(2/2)

Parameter

Symbol

Conditions

MIN. TYP.

MAX.

Unit

Transfer

rate

transmission 4.0 V

 EVDD0  5.5 V,

2.7 V

 Vb  4.0 V

Notes 1, 2

bps

Theoretical value of the maximum

transfer rate

Cb = 50 pF, Rb = 1.4 k

, Vb = 2.7 V

2.8

Note 3

Mbps

2.7 V

 EVDD0 < 4.0 V,

2.3 V

 Vb  2.7 V

Notes 2, 4

bps

Theoretical value of the maximum

transfer rate

Cb = 50 pF, Rb = 2.7 k

, Vb = 2.3 V

1.2

Note 5

Mbps

1.8 V

 EVDD0 < 3.3 V,

1.6 V

 Vb  2.0 V

Notes 2, 6, 7

bps

Theoretical value of the maximum

transfer rate

Cb = 50 pF, Rb = 5.5 k

, Vb = 1.6 V

0.40

Note 8

Mbps

Maximum transfer rate =

[bps]

Baud rate error (theoretical value) =

Transfer rate

 2

{-Cb

 Rb  In (1 -

)}

 3

2.2

{-Cb

 Rb  In (1 -

)}

2.2

(

)

 Number of transferred bits

Transfer rate

 100 [%]

* This value is the theoretical value of the relative difference between the transmission and reception sides.

Maximum transfer rate =

[bps]

Baud rate error (theoretical value) =

Transfer rate

 2

{-Cb

 Rb  In (1 -

)}

 3

2.0

{-Cb

 Rb  In (1 -

)}

2.0

(

)

 Number of transferred bits

Transfer rate

 100 [%]

* This value is the theoretical value of the relative difference between the transmission and reception sides.

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