AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 5

• Manufacturer Part Number: AT43USB325E-AC
• Description: IC USB KEYBOARD CTRLR HUB 64LQFP
• Manufacturer: Atmel
• Series: AVR®r

Specifications of AT43USB325E-AC

• Applications: Keyboard Controller
• Core Processor: AVR
• Program Memory Type: SRAM (16 kB)
• Controller Series: AT43USB
• Ram Size: 512 x 8
• Interface: SPI, 3-Wire Serial
• Number Of I /o: 42
• Voltage - Supply: 4.4 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

1.3
Note:
3355C–USB–4/05
Name
PF[1:3]
NC/SSN
TEST
RESETN
Signal Description (Continued)
Signal names ending with an N are active low.
Type
Bi-directional
Output
Input
Input
Function
Port F[1:3] – Bi-directional I/O port. In the AT43USB325E, these port pins have dual
functions as the interface pins to the serial EEPROM as shown below:
No Connect/Slave Select – In the AT43USB325M this pin is not used. In the AT43USB325E
this pin is the SPI slave select input used for enabling the serial memory during program
memory downloading.
Test Pin – This pin should be tied to ground.
Reset – Active low
Port Pin
PF1
PF2
PF3
Alternate Function 1
(AT43USB325E only)
SCK, SPI Master Clock Out
SI, SPI Slave Data Input
SO, SPI Slave Data Out
Alternate Function 2
OC1A, Timer/Counter1 Output Compare A
OC1B, Timer/Counter1 Output Compare B
ICP, Timer/Counter1 Input Capture
AT43USB325
5