AT43USB325E-AC Atmel, AT43USB325E-AC Datasheet - Page 5
AT43USB325E-AC
Manufacturer Part Number
AT43USB325E-AC
Description
IC USB KEYBOARD CTRLR HUB 64LQFP
Manufacturer
Atmel
Series
AVR®r
Datasheet
1.AT43USB325E-AC.pdf
(109 pages)
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
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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
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