RL78G12_15 Datasheet, PDF (40/110 Pages) Renesas Technology Corp – RENESAS MCU

RL78/G12
2. ELECTRICAL SPECIFICATIONS (A, D: TA = −40 to +85°C)
UART mode connection diagram (during communication at different potential)
TxDq
RL78
microcontroller
RxDq
Vb
Rb
Rx
User's device
Tx
TxDq
UART mode bit width (during communication at different potential) (reference)
1/Transfer rate
Low-bit width
High-bit width
Baud rate error tolerance
RxDq
1/Transfer rate
High-/Low-bit width
Baud rate error tolerance
<R> Remarks 1. Rb[Ω]: Communication line (TxDq) pull-up resistance, Cb[F]: Communication line (TxDq) load capacitance,
Vb[V]: Communication line voltage
<R>
2. q: UART number (q = 0 to 2), g: PIM and POM number (g = 0, 1)
<R>
3. fMCK: Serial array unit operation clock frequency
(Operation clock to be set by the serial clock select register m (SPSm) and the CKSmn bit of serial mode
register mn (SMRmn).
m: Unit number, n: Channel number (mn = 00 to 03, 10, 11))
4. UART0 of the 20- and 24-pin products supports communication at different potential only when the
peripheral I/O redirection function is not used.
R01DS0193EJ0200 Rev.2.00
Sep 06, 2013
Page 40 of 106