User Manual

DS506F2 Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved) 33
EP7311
High-Performance, Low-Power System on Chip
F7 SDCKE O SDRAM clock enable output
F8 DD[3] O LCD serial display data
F9 A[1] O System byte address
F10 D[6] I/O Data I/O
F11 VSSRTC RTC ground Real time clock ground
F12 BATOK I Battery ok input
F13 nBATCHG I Battery changed sense input
F14 VSSIO Pad ground I/O ground
F15 D[11] I/O Data I/O
F16 VDDIO Pad power Digital I/O power, 3.3V
G1 PB[1] I GPIO port B
G2 VDDIO Pad power Digital I/O power, 3.3V
G3 TDO O JTAG data out
G4 PB[4] I GPIO port B
G5 PB[6] I GPIO port B
G6 VSSRTC Core ground Real time clock ground
G7 VSSRTC RTC ground Real time clock ground
G8 DD[0] O LCD serial display data
G9 D[3] I/O Data I/O
G10 VSSRTC RTC ground Real time clock ground
G11 A[7] O System byte address
G12 A[8] O System byte address
G13 A[9] O System byte address
G14 VSSIO Pad ground I/O ground
G15 D[12] I/O Data I/O
G16 D[13] I/O Data I/O
H1 PA[7] I GPIO port A
H2 PA[5] I GPIO port A
H3 VSSIO Pad ground I/O ground
H4 PA[4] I GPIO port A
H5 PA[6] I GPIO port A
H6 PB[0] I GPIO port B
H7 PB[2] I GPIO port B
H8 VSSRTC RTC ground Real time clock ground
H9 VSSRTC RTC ground Real time clock ground
H10 A[10] O System byte address
H11 A[11] O System byte address
H12 A[12] O System byte address
H13 A[13]/DRA[14] O System byte address / SDRAM address
H14 VSSIO Pad ground I/O ground
H15 D[14] I/O Data I/O
H16 D[15] I/O Data I/O
J1 PA[3] I GPIO port A
J2 PA[1] I GPIO port A
J3 VSSIO Pad ground I/O ground
J4 PA[2] I GPIO port A
J5 PA[0] I GPIO port A
J6 TXD[1] O UART 1 transmit data out
Table T. 256-Ball PBGA Ball Listing (Continued)
Ball Location Name Type Description
J7 CTS I UART 1 clear to send input
J8 VSSRTC RTC ground Real time clock ground
J9 VSSRTC RTC ground Real time clock ground
J10 A[17]/DRA[10] O System byte address / SDRAM address
J11 A[16]/DRA[11] O System byte address / SDRAM address
J12 A[15]/DRA[12] O System byte address / SDRAM address
J13 A[14]/DRA[13] O System byte address / SDRAM address
J14 nTRST I JTAG async reset input
J15 D[16] I/O Data I/O
J16 D[17] I/O Data I/O
K1 LEDDRV O IR LED drivet
K2 PHDIN I Photodiode input
K3 VSSIO Pad ground I/O ground
K4 DCD I UART 1 data carrier detect
K5 nTEST[1] I Test mode select input
K6 EINT[3] I External interrupt
K7 VSSRTC RTC ground Real time clock ground
K8 ADCIN I SSI1 ADC serial input
K9 COL[4] O Keyboard scanner column drive
K10 TCLK I JTAG clock
K11 D[20] I/O Data I/O
K12 D[19] I/O Data I/O
K13 D[18] I/O Data I/O
K14 VSSIO Pad ground I/O ground
K15 VDDIO Pad power Digital I/O power, 3.3V
K16 VDDIO Pad power Digital I/O power, 3.3V
L1 RXD[1] I UART 1 receive data input
L2 DSR I UART 1 data set ready input
L3 VDDIO Pad power Digital I/O power, 3.3V
L4 nEINT[1] I External interrupt input
L5 PE[2]/CLKSEL I GPIO port E / clock input mode select
L6 VSSRTC RTC ground Real time clock ground
L7 PD[0]/LEDFLSH I/O GPIO port D / LED blinker output
L8 VSSRTC Core ground Real time clock ground
L9 COL[6] O Keyboard scanner column drive
L10 D[31] I/O Data I/O
L11 VSSRTC RTC ground Real time clock ground
L12 A[22]/DRA[5] O System byte address / SDRAM address
L13 A[21]/DRA[6] O System byte address / SDRAM address
L14 VSSIO Pad ground I/O ground
L15 A[18]/DRA[9] O System byte address / SDRAM address
L16 A[19]/DRA[8] O System byte address / SDRAM address
M1 nTEST[0] I Test mode select input
M2 nEINT[2] I External interrupt input
M3 VDDIO Pad power Digital I/O power, 3.3V
M4 PE[0]/BOOTSEL[0] I GPIO port E / Boot mode select
M5 TMS I JTAG mode select
M6 VDDIO Pad power Digital I/O power, 3.3V
Table T. 256-Ball PBGA Ball Listing (Continued)
Ball Location Name Type Description