7641_06 Datasheet, PDF (335/385 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

7641 Group
APPENDIX
3.5 Control registers
Port P2 pull-up control register
b7 b6 b5 b4 b3 b2 b1 b0
Port P2 pull-upt control register
(PUP2 : address 1216)
b
Name
0 Port P20 pull-up control bit 0 : Disabled
1 : Enabled
1 Port P21 pull-up control bit 0 : Disabled
1 : Enabled
2 Port P22 pull-up control bit 0 : Disabled
1 : Enabled
3 Port P23 pull-up control bit 0 : Disabled
1 : Enabled
4 Port P24 pull-up control bit 0 : Disabled
1 : Enabled
5 Port P25 pull-up control bit 0 : Disabled
1 : Enabled
6 Port P26 pull-up control bit 0 : Disabled
1 : Enabled
7 Port P27 pull-up control bit 0 : Disabled
1 : Enabled
Functions
Fig. 3.5.15 Structure of Port P2 pull-up control register
At reset R W
0
0
0
0
0
0
0
0
USB control register
b7 b6 b5 b4 b3 b2 b1 b0
0 ^{USB control register}
(USBC : address 1316)
b
Name
0 Fix this bit to “0”.
Functions
At reset R W
0
1 USB default state selection 0 : In default state after power-on/reset
0
bit (USBC1)
1 : In default state after USB reset signal
received
2 USB artificial SOF enable 0 : Artificial SOF disabled
0
bit (USBC2)
1 : Artificial SOF enabled
3 USB line driver current 0 : High current mode
0
control bit (USBC3)
1 : Low current mode
4 USB line driver supply
0 : Line driver disabled
0
enable bit (USBC4) (Note 1) 1 : Line driver enabled
5 USB clock enable bit
(USBC5)
0 : 48 MHz clock to the USB block disabled 0
1 : 48 MHz clock to the USB block enabled
6 _{USB SOF port select bit} 0 : SOF output disabled
0
(USBC6)
1 : SOF output enabled
7 USB enable bit (USBC7) ^{0 : USB block disabled (Note 2)}
0
1 : USB block enabled
Notes 1: When using the MCU in Vcc = 3.3 V, set this bit to “0” and disable the built-in DC-
DC converter.
2: Setting this bit to 0” causes the contents of all USB registers to have the values at
reset.
Fig. 3.5.16 Structure of USB control register
Rev.2.00 Aug 28, 2006 page 56 of 108
REJ09B0336-0200