TCC76 Datasheet, PDF (158/259 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC76x
Specification Rev. 0.07
February 23, 2005
32-bit RISC Microprocessor for Digital Media Player
MISCELLANEOUS PERIPHERALS
The TCC76x supports programmable output drive strength and controllable pull-up resistor for the GPIO pins.
For the external bus address and command signals, only the drive strength control is supported.
CFGDRV x H
CFGDRV x L
Control bits f rom
Buf f er Drive Strength Select
A L/A H ~ DL/DH, XL/XH registers
Control logic
DH
{DH,DL} Drive
====== =====
DL _{00: 4mA}
01: 6mA
10: 8mA
11: 12mA
CFGPUx
Control bits f rom
Pull-Up Enable A ~ D registers
PAD
Figure 12.2 Pull-Up and Drive Strength Control
Note that pull-up and drive strength control is not applicable to GPIO_B[29:26] which are USB transceiver I/O pins.
Pull-Up Enable A (CFGPUA)
Bit Name R/W Reset Description
31:0 CFGPUA R/W 0x00000000 Pull-Up Enables for GPIO_A pins.
0x80000A20
Pull-Up Enable B (CFGPUB)
Bit Name R/W Reset Description
31:0 CFGPUB R/W 0x00000000 Pull-Up Enables for GPIO_B pins.
0x80000A24
Pull-Up Enable C (CFGPUC)
Bit Name R/W Reset Description
31:0 CFGPUC R/W 0x00000000 Pull-Up Enables for GPIO_C pins.
0x80000A28
Pull-Up Enable D (CFGPUD)
Bit Name R/W Reset
31 CFGPUXD R/W
0
30:0 CFGPUD R/W 0x003C0000
Description
Pull-Up Enable for XD[15:0] pins.
Pull-Up Enables for GPIO_D pins.
0x80000A2C
Buffer Drive Strength Select AL (CFGDRVAL)
0x80000A30
Bit
Name R/W Reset Description
31:0 CFGDRVAL R/W 0x00000000 Buffer Drive Strength Select for GPIO_A pins.
Buffer Drive Strength Select AH (CFGDRVAH)
0x80000A34
Bit
Name R/W Reset Description
31:0 CFGDRVAH R/W 0x00000000 Buffer Drive Strength Select for GPIO_A pins.
Buffer Drive Strength Select BL (CFGDRVBL)
0x80000A38
Bit
Name R/W Reset Description
31:0 CFGDRVBL R/W 0x00000000 Buffer Drive Strength Select for GPIO_B pins.
Preliminary
12-6