AT91SAM7X128-CU Atmel, AT91SAM7X128-CU Datasheet - Page 282

• Manufacturer Part Number: AT91SAM7X128-CU
• Description: MCU ARM 128K HS FLASH 100-TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM7X128-CU

• Core Processor: ARM7
• Core Size: 16/32-Bit
• Speed: 55MHz
• Connectivity: CAN, Ethernet, I²C, SPI, SSC, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 62
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TFBGA
• For Use With: AT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9AT91SAM7X-EK - KIT EVAL FOR AT91SAM7X256/128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

29.3
29.3.1
29.4
29.4.1
29.4.2
29.4.3
282
Application Block Diagram
Product Dependencies
AT91SAM7X512/256/128 Preliminary
I/O Lines Description
I/O Lines
Power Management
Interrupt
Figure 29-2. Application Block Diagram
Table 29-2.
Both TWD and TWCK are bidirectional lines, connected to a positive supply voltage via a current
source or pull-up resistor (see
high. The output stages of devices connected to the bus must have an open-drain or open-col-
lector to perform the wired-AND function.
TWD and TWCK pins may be multiplexed with PIO lines. To enable the TWI, the programmer
must perform the following steps:
The TWI interface may be clocked through the Power Management Controller (PMC), thus the
programmer must first configure the PMC to enable the TWI clock.
The TWI interface has an interrupt line connected to the Advanced Interrupt Controller (AIC). In
order to handle interrupts, the AIC must be programmed before configuring the TWI.
Pin Name
TWD
TWCK
• Program the PIO controller to:
• Enable the peripheral clock.
Rp: Pull up value as given by the I²C Standard
Host with
Interface
– Dedicate TWD and TWCK as peripheral lines.
– Define TWD and TWCK as open-drain.
TWI
TWD
TWCK
I/O Lines Description
Serial EEPROM
Atmel TWI
Slave 1
Pin Description
Two-wire Serial Data
Two-wire Serial Clock
Figure 29-2 on page
I²C RTC
Slave 2
Controller
I²C LCD
Slave 3
282). When the bus is free, both lines are
I²C Temp.
Slave 4
Sensor
Rp
6120H–ATARM–17-Feb-09
Input/Output
Input/Output
Type
Rp
VDD