Requirements
2-14
AT91CAP9-STK Starter Kit User Guide
6351B–CAP–27-Jun-08
2.4.1.2.2 MPIO Bus Characteristics
The FPGA is connected to the AT91CAP9 microcontroller through the two MPIO buses:
First MPIO bus: MPIOA[0:31], connected to FPGA bank 1
Second MPIO bus: MPIOB[0:44], connected to FPGA banks 2 and 5
Bus frequency: 100MHz
Dedicated MPIO bus clock: MPIOB24
2.4.1.2.3 FPGA Power Supplies
Power for VDDMPIO, VCCIO4, VCCIO6, VCCIO7, and VCCIO8 can be supplied either by 3V3 or 1V8
(1V8_CAP9) power supplies. (
See “F10: Power Supplies and Low-power Mode” on page 2-22.
)
Choice is made by 0
Ω
resistor as shown below (VCCIO7 example):
Each of the six FPGA PLL blocks have two power supply pins: VCCA_PPLw and VCCD_PPLx (x = from
to 6).
Table 2-16. FPGA Bank Power Supplies
Bank 1
VDDMPIO (default 1V8_FPGA)
Bank 2
VDDMPIO (default 1V8_FPGA)
Bank 3
3V3
Bank 4
VCCIO4 (default 3V3)
Bank 5
VDDMPIO (default 1V8_FPGA)
Bank 6
VCCIO6 (default 1V8_FPGA)
Bank 7
VCCIO7 (default 3V3)
Bank 8
VCCIO8 (default 3V3)
Bank 9
3V3
Bank 10
3V3
Table 2-17. FPGA PLL Block Power Supply
PLL Supply Pin Name
Power Supply
VCCA_PPL1
VCC_PLL12
VCCA_PPL2
VCC_PLL12
VCCA_PPL3
VCC_PLL34
VCCA_PPL4
VCC_PLL34
VCCA_PPL5
VCC_PLL56
AB3
AB11
3V3
VCCIO7
C256
10nF
1
2
C257
10nF
1
2
C271
100nF
1
2
R181
0R
NC
R183
0R
1V8