Datasheet

RL78/G13 3. ELECTRICAL SPECIFICATIONS (G: T
A = -40 to +105°C)
Page 145 of 194R01DS0131EJ0310 Rev.3.10
Nov 15, 2013
3.5 Peripheral Functions Characteristics
AC Timing Test Points
VIH/VOH
VIL/VOL
Test points
V
IH/VOH
VIL/VOL
3.5.1 Serial array unit
(1) During communication at same potential (UART mode)
(T
A = −40 to +105°C, 2.4 V ≤ EVDD0 = EVDD1 ≤ VDD ≤ 5.5 V, VSS = EVSS0 = EVSS1 = 0 V)
Parameter Symbol Conditions HS (high-speed main) Mode Unit
MIN. MAX.
Transfer rate
Note 1
fMCK/12
Note 2
bps
Theoretical value of the
maximum transfer rate
f
CLK = 32 MHz, fMCK = fCLK
2.6 Mbps
Notes 1. Transfer rate in the SNOOZE mode is 4800 bps only.
2. The following conditions are required for low voltage interface when EVDD0 < VDD.
2.4 V ≤ EV
DD0 < 2.7 V : MAX. 1.3 Mbps
Caution Select the normal input buffer for the RxDq pin and the normal output mode for the TxDq pin by
using port input mode register g (PIMg) and port output mode register g (POMg).
UART mode connection diagram (during communication at same potential)
RL78 microcontroller
TxDq
RxDq
Rx
Tx
User device
UART mode bit width (during communication at same potential) (reference)
Baud rate error tolerance
High-/Low-bit width
1/Transfer rate
TxDq
RxDq
Remarks 1. q: UART number (q = 0 to 3), g: PIM and POM number (g = 0, 1, 8, 14)
2. 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 to 13))