UPD78F1502AGK-GAK-AX Datasheet, PDF (927/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 31 ELECTRICAL SPECIFICATIONS
(2) Serial interface: Serial array unit (10/18)
UART mode connection diagram (communication at different potential)
TxDq
78K0R/Lx3
microcontrollers
RxDq
Vb
Rb
Rx
User's device
Tx
TxDq
UART mode bit width (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
Caution Select the TTL input buffer for RxDq and the N-ch open drain output (VDD tolerance) mode for TxDq by
using the PIMg and POMx registers.
Remarks 1. Rb[Ω]:Communication line (TxDq) pull-up resistance, Vb[V]: Communication line voltage
2. q: UART number (q = 0 to 3) , g: PIM number (g = 1, 7), x: POM number (x = 1, 7, 8)
R01UH0004EJ0501 Rev.5.01
911
Jun 20, 2011