Datasheet

RL78/G13 2. ELECTRICAL SPECIFICATIONS (A, D: T
A = -40 to +85°C)
Page 92 of 194R01DS0131EJ0310 Rev.3.10
Nov 15, 2013
(6) Communication at different potential (1.8 V, 2.5 V, 3 V) (UART mode) (2/2)
(TA = −40 to +85°C, 1.8 V ≤ EVDD0 = EVDD1 ≤ VDD ≤ 5.5 V, VSS = EVSS0 = EVSS1 = 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 Transmission 4.0 V ≤ EVDD0 ≤ 5.5 V,
2.7 V ≤ V
b ≤ 4.0 V
Note
1
Note
1
Note
1
bps
Theoretical
value of the
maximum
transfer rate
C
b = 50 pF, R b =
1.4 k
Ω , V b = 2.7
V
2.8
Note 2
2.8
Note 2
2.8
Note 2
Mbps
2.7 V ≤ EVDD0 < 4.0 V,
2.3 V ≤ V
b ≤ 2.7 V
Note
3
Note
3
Note
3
bps
Theoretical
value of the
maximum
transfer rate
C
b = 50 pF, R b =
2.7 k
Ω , V b = 2.3
V
1.2
Note 4
1.2
Note 4
1.2
Note 4
Mbps
1.8 V ≤ EVDD0 < 3.3 V,
1.6 V ≤ V
b ≤ 2.0 V
Notes
5, 6
Notes
5, 6
Notes
5, 6
bps
Theoretical
value of the
maximum
transfer rate
C
b = 50 pF, R b =
5.5 k
Ω , V b = 1.6
V
0.43
Note 7
0.43
Note 7
0.43
Note 7
Mbps
Notes 1. The smaller maximum transfer rate derived by using f
MCK/6 or the following expression is the valid
maximum transfer rate.
Expression for calculating the transfer rate when 4.0 V ≤ EV
DD0 ≤ 5.5 V and 2.7 V ≤ Vb ≤ 4.0 V
Maximum transfer rate =
1
[bps]
{−C
b × Rb × ln (1 −
2.2
V
b
)} × 3
1
Transfer rate × 2
− {−Cb × Rb × ln (1 −
2.2
V
b
)}
Baud rate error (theoretical value) = × 100 [%]
(
1
Transfer rate
) × Number of transferred bits
* This value is the theoretical value of the relative difference between the transmission and reception sides.
2. 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.