RL78 datasheet(36/42 Pages) RENESAS

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QB-RL78L1C In-Circuit Emulator

CHAPTER 4

CAUTIONS

R20UT2703EJ0200

Rev.2.00

Page 36 of 42

Jan 31, 2014

- D+/D- pull-up operation when using USB function module (RL78/L1C only)

D+/D- pull-up operation on QB-RL78L1C differs from the target device.

Target device:

- D+ pull-up is enabled when bit 4 of the system configuration control register (SYSCFG) is “1”

(DPRPU = “1”)

- D- pull-up is enabled when bit 3 of the system configuration control register (SYSCFG) is “1”

(DMRPU = “1”)

QB-RL78L1C:

Either bit 4 (DPRPU) or bit 3 (DMRPU) of the system configuration control register (SYSCFG) is

made "1", D- or D+ is pulled up as follows.

- D+ pull-up is enabled when using the full-speed operation.

- D- pull-up is enabled when using the low-speed operation.

- Operating voltage of USB battery charging detection (RL78/L1C only)

Operation voltage of USB battery charging detection on QB-RL78L1C differs from the target device.

Target device:

Operation voltage is proportional to UVBUS voltage levels because it is generated by the supply

voltage of UVBUS pin.

QB-RL78L1C:

Operation voltage is 5V because it is generated by QB-RL78L1C internal power supply (5V).

RL78 数据表(PDF) 36 Page - Renesas Technology Corp