User Manual

34 Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved) DS506F2
EP7311
High-Performance, Low-Power System on Chip
M7 SSITXFR I/O MCP/CODEC/SSI2 frame sync
M8 DRIVE[1] I/O PWM drive output
M9 FB[0] I PWM feedback input
M10 COL[0] O Keyboard scanner column drive
M11 D[27] I/O Data I/O
M12 VSSIO Pad ground I/O ground
M13 A[23]/DRA[4] O System byte address / SDRAM address
M14 VDDIO Pad power Digital I/O power, 3.3V
M15 A[20]/DRA[7] O System byte address / SDRAM address
M16 D[21] I/O Data I/O
N1 nEXTFIQ I External fast interrupt input
N2 PE[1]/BOOTSEL[1] I GPIO port E / boot mode select
N3 VSSIO Pad ground I/O ground
N4 VDDIO Pad power Digital I/O power, 3.3V
N5 PD[5] I/O GPIO port D
N6 PD[2] I/O GPIO port D
N7 SSIRXDA I/O MCP/CODEC/SSI2 serial data input
N8 ADCCLK O SSI1 ADC serial clock
N9 SMPCLK O SSI1 ADC sample clock
N10 COL[2] O Keyboard scanner column drive
N11 D[29] I/O Data I/O
N12 D[26] I/O Data I/O
N13 HALFWORD O Halfword access select output
N14 VSSIO Pad ground I/O ground
N15 D[22] I/O Data I/O
N16 D[23] I/O Data I/O
P1 VSSRTC RTC ground Real time clock ground
P2 RTCOUT O Real time clock oscillator output
P3 VSSIO Pad ground I/O ground
P4 VSSIO Pad ground I/O ground
P5 VDDIO Pad power Digital I/O power, 3.3V
P6 VSSIO Pad ground I/O ground
P7 VSSIO Pad ground I/O ground
P8 VDDIO Pad power Digital I/O power, 3.3V
P9 VSSIO Pad ground I/O ground
P10 VDDIO Pad power Digital I/O power, 3.3V
P11 VSSIO Pad ground I/O ground
P12 VSSIO Pad ground I/O ground
P13 VDDIO Pad power Digital I/O power
P14 VSSIO Pad ground I/O ground
P15 D[24] I/O Data I/O
P16 VDDIO Pad power Digital I/O power, 3.3V
R1 RTCIN I/O Real time clock oscillator input
R2 VDDIO Pad power Digital I/O power, 3.3V
R3 PD[4] I/O GPIO port D
R4 PD[1] I/O GPIO port D
R5 SSITXDA O MCP/CODEC/SSI2 serial data output
R6 nADCCS O SSI1 ADC chip select
Table T. 256-Ball PBGA Ball Listing (Continued)
Ball Location Name Type Description
R7 VDDIO Pad power Digital I/O power, 3.3V
R8 ADCOUT O SSI1 ADC serial data output
R9 COL[7] O Keyboard scanner column drive
R10 COL[3] O Keyboard scanner column drive
R11 COL[1] O Keyboard scanner column drive
R12 D[30] I/O Data I/O
R13 A[27]/DRA[0] O System byte address / SDRAM address
R14 A[25]/DRA[2] O System byte address / SDRAM address
R15 VDDIO Pad power Digital I/O power, 3.3V
R16 A[24]/DRA[3] O System byte address / SDRAM address
T1 VDDRTC RTC power Real time clock power, 2.5V
T2 PD[7]/SDQM[1] I/O GPIO port D / SDRAM byte lane mask
T3 PD[6]/SDQM[0] I/O GPIO port D / SDRAM byte lane mask
T4 PD[3] I/O GPIO port D
T5 SSICLK I/O MCP/CODEC/SSI2 serial clock
T6 SSIRXFR – MCP/CODEC/SSI2 frame sync
T7 VDDCORE Core power Core power, 2.5V
T8 DRIVE[0] I/O PWM drive output
T9 FB[1] I PWM feedback input
T10 COL[5] O Keyboard scanner column drive
T11 VDDIO Pad power Digital I/O power, 3.3V
T12 BUZ O Buzzer drive output
T13 D[28] I/O Data I/O
T14 A[26]/DRA[1] O System byte address / SDRAM address
T15 D[25] I/O Data I/O
T16 VSSIO Pad ground I/O ground
Table T. 256-Ball PBGA Ball Listing (Continued)
Ball Location Name Type Description