R5F10WMDA datasheet(41/126 Pages) RENESAS

41 / 126 page

RL78/L13

2. ELECTRICAL SPECIFICATIONS (TA =

−40 to +85°C)

R01DS0168EJ0210 Rev.2.10

Aug 12, 2016

Page 41 of 123

(5) Communication at different potential (1.8 V, 2.5 V, 3 V) (UART mode) (2/2)

(TA =

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

Parameter

Symbol

Conditions

HS (high-speed

main) Mode

LS (low-speed

main) Mode

LV (low-voltage

main) Mode

Unit

MIN.

MAX.

MIN.

MAX.

MIN.

MAX.

Transfer rate

Trans

mission

4.0 V

≤ VDD ≤ 5.5 V,

2.7 V

≤ Vb ≤ 4.0 V

Note 1

bps

Theoretical value of the maximum

transfer rate

(Cb = 50 pF, Rb = 1.4 k

Ω, Vb = 2.7 V)

2.8Note 2

2.8Note 2 Mbps

2.7 V

≤ VDD < 4.0 V,

2.3 V

≤ Vb ≤ 2.7 V

Note 3

bps

Theoretical value of the maximum

transfer rate

(Cb = 50 pF, Rb = 2.7 k

Ω, Vb = 2.3 V)

1.2Note 4

1.2Note 4 Mbps

1.8 V (2.4 VNote 8)

≤ VDD < 3.3 V,

1.6 V

≤ Vb ≤ 2.0 V

Notes

5, 6

Notes

5, 6

Notes

5, 6

bps

Theoretical value of the maximum

transfer rate

(Cb = 50 pF, Rb = 5.5 k

Ω, Vb = 1.6 V)

0.43Note 7

0.43Note 7 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

≤ VDD ≤ 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 −

{

−Cb × 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.

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

≤ VDD < 4.0 V and 2.3 V ≤ Vb ≤ 2.7 V

Maximum transfer rate =

[bps]

{

−Cb × Rb × ln (1 −

2.0

Vb )} × 3

Transfer rate

× 2 −

{

−Cb × 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 3 above to calculate the maximum transfer rate under conditions of the customer.

Use it with VDD

≥ Vb.

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