Cirrus Logic EP7309 - Manual (Page 33)

DS507F2
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Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved) 33
EP7309
High-Performance, Low-Power System on Chip
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 DAI/CODEC/SSI2 serial data output
R6 nADCCS O SSI1 ADC chip select
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] O System byte address
R14 A[25] O System byte address
R15 VDDIO Pad power Digital I/O power, 3.3V
R16 A[24] O System byte address
T1 VDDRTC RTC power Real time clock power, 2.5V
T2 PD[7] I/O GPIO port D
T3 PD[6] I/O GPIO port D
T4 PD[3] I/O GPIO port D
T5 SSICLK I/O DAI/CODEC/SSI2 serial clock
T6 SSIRXFR – DAI/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] O System byte address
T15 D[25] I/O Data I/O
T16 VSSIO Pad ground I/O ground
Table 20. 256-Ball PBGA Ball Listing (Continued)
Ball Location Name Type Description