R5F10RB8AFP datasheet(41/76 Pages) RENESAS

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RL78/L12

2. ELECTRICAL SPECIFICATIONS (TARGET)

Page 41 of 73

R01DS0157EJ0001 Rev.0.01

2012.02.20

Under development

Preliminary document

Specifications in this document are tentative and subject to change.

Caution

The pins mounted depend on the product.

Refer to 1.3.1

32-pin products to 1.3.5

64-pin

products.

(4) Communication at different potential (2.5 V, 3 V) (UART mode) (dedicated baud rate generator output) (2/2)

(TA =

−40 to +85°C, 1.8 V ≤ EVDD = VDD ≤ 5.5 V, VSS = EVSS = 0 V)

Parameter

Symbol

Conditions

MIN.

TYP.

MAX.

Unit

Notes

1, 2

bps

4.0 V

≤ EVDD ≤ 5.5 V,

2.7 V

≤ Vb ≤ 4.0 V

Theoretical

value

the

maximum transfer rate

Cb = 50 pF, Rb = 1.4 k

Ω, Vb = 2.7 V

2.8

Note 3

Mbps

Notes

2, 4

bps

2.7 V

≤ EVDD < 4.0 V,

2.3 V

≤ Vb ≤ 2.7 V

Theoretical

value

the

maximum transfer rate

Cb = 50 pF, Rb = 2.7 k

Ω, Vb = 2.3 V

1.2

Note 5

Mbps

Notes

2, 6, 7

bps

Transfer rate

transmission

1.8 V

≤ EVDD < 3.3 V,

1.6 V

≤ Vb ≤ 2.0 V

Theoretical

value

the

maximum transfer rate

Cb = 50 pF, Rb = 5.5 k

Ω, Vb = 1.6 V

0.43

Notes 8

Mbps

Notes 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

≤ EVDD ≤ 5.5 V and 2.7 V ≤ Vb ≤ 4.0 V

Maximum transfer rate =

[bps]

{

−Cb × Rb × ln (1 −

2.2

Vb )} × 3

Transfer rate

× 2 − {−C

× Rb × ln (1

−

2.2

Vb )}

Baud rate error (theoretical value) =

× 100 [%]

(

Transfer rate ) × Number of transferred bits

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

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

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.

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

≤ EVDD < 4.0 V and 2.3 V ≤ Vb ≤ 2.7 V

Maximum transfer rate =

{

−Cb × Rb × ln (1 −

2.0

Vb )} × 3

[bps]

Transfer rate

× 2 − {−C

× Rb × ln (1

−

2.0

Vb )}

Baud rate error (theoretical value) =

× 100 [%]

(

Transfer rate ) × Number of transferred bits

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

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.

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