Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet
Product codes
AT91SAM9N12-EK
707
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
39.4
Block Diagram
Figure 39-1. Block Diagram
39.5
Application Block Diagram
Figure 39-2. Application Block Diagram
39.5.1 I/O Lines Description
APB Bridge
PMC
MCK
Two-wire
Interface
PIO
Interrupt
Controller
TWI
Interrupt
TWCK
TWD
Host with
TWI
Interface
TWD
TWCK
Atmel TWI
Serial EEPROM
I²C RTC
I²C LCD
Controller
Slave 1
Slave 2
Slave 3
V
DD
I²C Temp.
Sensor
Slave 4
Rp: Pull-up value as given by the I²C Standard
Rp
Rp
Table 39-3. I/O Lines Description
Pin Name
Pin Description
Type
TWD
Two-wire Serial Data
Input/Output
TWCK
Two-wire Serial Clock
Input/Output