Renesas rl78 User Manual
RL78/G1A
CHAPTER 30 ELECTRICAL SPECIFICATIONS (G: INDUSTRIAL APPLICATIONS T
A
=
−40 to +105°C)
R01UH0305EJ0200 Rev.2.00
931
Jul 04, 2013
(5) Communication at different potential (1.8 V, 2.5 V) (UART mode) (dedicated baud rate generator output) (1/2)
(T
A
=
−40 to +105°C, 2.4 V ≤ EV
DD0
≤ V
DD
≤ 3.6 V, V
SS
= EV
SS0
= 0 V)
Parameter Symbol
Conditions
MIN. TYP.
MAX.
Unit
f
MCK
/12
bps
2.7 V
≤ EV
DD0
≤ 3.6 V,
2.3 V
≤ V
b
≤ 2.7 V
Theoretical value of the
maximum transfer rate
f
CLK
= 32 MHz, f
MCK
= f
CLK
2.6
Mbps
f
MCK
/12
bps
Transfer rate
Note 1
Reception
2.4 V
≤ EV
DD0
< 3.3 V,
1.6 V
≤ V
b
≤ 2.0 V
Theoretical value of the
maximum transfer rate
f
CLK
= 32 MHz, f
MCK
= f
CLK
2.6
Note 2
Mbps
Notes 1. Transfer rate in the SNOOZE mode is 4800 bps.
2. The following conditions are required for low-voltage interface when EV
DD0
< V
DD
.
2.4 V
≤ EV
DD0
< 2.7 V : MAX. 1.3 Mbps
Caution Select the TTL input buffer for the RxDq pin and the N-ch open drain output (V
DD
tolerance (When 25- to
48-pin products)/EV
DD
tolerance (When 64-pin products)) mode for the TxDq pin by using port input
mode register g (PIMg) and port output mode register g (POMg). For V
IH
and V
IL
, see the DC
characteristics with TTL input buffer selected.
Remarks 1. V
b
[V]: Communication line voltage
2.
q: UART number (q = 0 to 2), g: PIM and POM number (g = 0, 1)
3.
f
MCK
: Serial array unit operation clock frequency
(Operation clock to be set by the CKSmn bit of serial mode register mn (SMRmn). m: Unit number,
n: Channel number (mn = 00 to 03, 10, 11)
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