Atmark Techno Armadillo-420, Руководство по оборудованию, Страница: 18 / 59

Symbol Parameter Min Max Units Conditions
IOL_F
Low-Level Output Current,
Fast Slew Rate
4.0 mA
VOH = 0.2 x OVDD,
Std Drive
6.0 mA
VOH = 0.2 x OVDD,
High Drive
8.0 mA
VOH = 0.2 x OVDD,
Max Drive
IIN
Input Current (no PU/PD
[1]
)
0.1 製A VI = 0
0.06 製A VI = OVDD = +3.3V
Input Current (22k製PU)
117 184 製A VI = 0
0.0001 0.0001 製A VI = OVDD = +3.3V
Input Current (47k製PU)
54 88 製A VI = 0
0.0001 0.0001 製A VI = OVDD = +3.3V
Input Current (100k製PU)
25 42 製A VI = 0
0.0001 0.0001 製A VI = OVDD = +3.3V
Input Current (100k製PD)
0.0001 0.0001 製A VI = 0
25 42 製A VI = OVDD = +3.3V
ICC
High-impedance Supply
Current
1.2 製A VI = 0
1.2 製A VI = OVDD = +3.3V
[1]
PU=Pull Up, PD=Pull Down
5.3. CON1 (microSD slot)
CON1 is a microSD/microMMC slot connected to a SD/MMC controller (SDHC1) in i.MX257. microSD card power
supply can be controlled
[1]
with the NFRE_B (GPIO3_27) pin on i.MX257.
5.5 CON1 Signals
Pin Number Signal Name I/O Function
1 SD1_DAT2 In/Out
Data bus (bit 2),
connected to SD1_DATA2 pin on i.MX257
2 SD1_DAT3 In/Out
Data bus (bit 3),
connected to SD1_DATA3 pin on i.MX257
3 SD1_CMD In/Out
Command / Response,
connected to SD1_CMD pin on i.MX257
4 VDD Power Power (+3.3V_CPU)
[1]
5 SD1_CLK Out
Clock,
connected to SD1_CLK pin on i.MX257
6 VSS Power Power (GND)
7 SD1_DAT0 In/Out
Data bus (bit 0),
connected to SD1_DATA0 pin on i.MX257
8 SD1_DAT1 In/Out
Data bus (bit 1),
connected to SD1_DATA1 pin on i.MX257
9 SD1_CD* In
Card detect (low: card inserted, high: card ejected)
connected to NFRB (GPIO3_31) pin on i.MX257
[1]
The combined maximum output current of CON1, CON4, CON7 and CON10 is 200mA.
[1]
After the NFRE_B (GPIO3_27) pin on i.MX257 is set to GPIO output mode, power supply will start on a low signal and stop on a high signal.
Armadillo-400 Series Hardware Manual Interface Specifications
18