JC8048W550-C Pin distribution question

[hape65]

hi
i have the above board and this are the pins:

my question : there are a few pins which are bound to different things like IO8 is U1RXD as also b(lue)0 for parallel output pin for display.
So it is possible to share pins between different functions? The pins on the right like SPI 2 is for the TFCard as also for SPI. So could i use SPI (an 4pin expansion on the board) and the TFCard simultaneously?
Someone any ideas
regards
hape

[hape65]

Code: Select all

[quote]Serial Number	Pin	Notes	Connect						
1	IO8	U1RXD	DB1(B)	b0					
2	IO3		DB2(B)	b1					
3	IO46		DB3(B)	b2					
4	IO9		DB4(B)	b3					
5	IO1		DB5(B)	b4					
6	IO39		HSYNC	x					
7	IO41		VSYNC	x					
8	IO40		DE	x					
9	IO5		DB6(G)	g0					
10	IO7		DB8(G)	g2					
11	IO15		DB9(G)	g3					
12	IO16		DB10(G)	g4					
13	IO4		DB11(G)	g5					
14	IO45		DB13(R)	r0					
15	IO48		DB14(R)	r1					
16	IO47		DB15(R)	r2					
17	IO21		DB16(R)	r3					
18	IO43	U0TXD	TX						
19	IO44	U0RXD	RX						
20	IO0	BOOT	I2S-BCLK/L3						
21	IO18		I2S-LRCLK/L2			UART1/USB 2	P4 4		
22	IO10	SPICS0	TF(CS)						
23	IO11	SPID	TF(MISO)		SPI 2				
24	IO17	U1TXD	IS2-DIN/L1			UART1/USB 1	P4 3		
25	IO38		TP_CS						
26	IO2		BL_C						
27	IO37								
28	IO36								
29	IO35								
30	IO14		DB17(R)	r4					
31	IO20	USB_D+	TP_SCL			UART1/USB 3			
32	IO12	SPICLK	TF(SCK)/TP_CLK		SPI 3				
33	IO13	SPIQ	TF(MOSI)		SPI 4				
34	IO42		PCLK	x					
35	IO6		DB7(G)	g1					
36	IO19	USB_D-	TP_SDA		SPI 1	UART1/USB 4			
GND	GND						P4 1	P5 4	
3,3V	3,3V						P4 2		
5V	5V							P5 1	P5 2 TXD P5 3 RXD[/quote]