ST2205U
TABLE 3-2 Signal Function Groups (continued)
Function Group
Pad No.
Designation
Description
Flash Data Bus
Flash read/write
signals
Chip selects
UART
65~67,
69~73
27,28
21~26
8,9
27,28
3~7
FD7~0/PF7~0
RXD1/ FWR /PD7
TXD1/ FRD /PD6
CS5 ~ 1
/PD4~0,
CS6
/A23/PD5
RXD0/PC7,TXD0/PC
6, RXD1/ FWR /PD7
TXD1/ FRD /PD6
DATA_READY
/PC5 ,
SS
/PC4 , SDO/PC3 ,
SDI/PC2 , SCK/PC1
BCO/INTX2/PE2 ,
OSCN/INTX1//PE1
TCO0/INTX0//PE0
FLM/PL7, LP1/PL6,
AC/PL5 , CP/PL4,
LD[3:0]/PL3~0,
LD[7:4]/PE6~3,
LP2/PE7,
POFF
,
BLANK
,
VBUS,
RPULL, VOUT3.3,
D+, D-
Flash data bus
When function bits are set, and I/O direction is output, and FEN=1,
PD7/6 are flash control signals
I/O port D and chip-select outputs
UART signals and I/Os
SPI signals and I/Os
SPI
Clocking output/
External clock
input or interrupt
sources
13~15
When function bits are set, and I/O direction is output, these three
can be clocking outputs.
When function bits are set, and I/O direction is input, these three
can be external clock inputs or external interrupt sources.
When function bits are cleared, they are three GPIOs.
LCD control signals
LCD control
signals
12,16~20,
74~82
USB 2.0 Full
speed
97~99,101
102
VBUS:
Connect to USB bus power
D+,D-:
USB differential signal pins
RPULL:
Add a resistor of 1.5K between this pin and D+
VOUT3.3:
3.3V regulator output. Connect to USBVDD to supply
power for the analog transceiver of USB
Version 1.0
4/32
6/13/2007
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
