AT91SAM7X128 Atmel, AT91SAM7X128 Datasheet - Page 448

• Manufacturer Part Number: AT91SAM7X128
• Description: MCU 32-Bit 91S ARM7TDMI RISC 128KB Flash 1.8V/3.3V 100-Pin LQFP
• Manufacturer: Atmel

Specifications of AT91SAM7X128

• Package: 100LQFP
• Device Core: ARM7TDMI
• Family Name: 91S
• Maximum Speed: 55 MHz
• Ram Size: 32 KB
• Program Memory Size: 128 KB
• Operating Supply Voltage: 1.8|3.3 V
• Data Bus Width: 32 Bit
• Program Memory Type: Flash
• Number Of Programmable I/os: 62
• Interface Type: CAN/Ethernet/SPI/I2S/TWI/USART/USB
• On-chip Adc: 8-chx10-bit
• Operating Temperature: -40 to 85 °C
• Number Of Timers: 3

34.2
Figure 34-1. Block Diagram
448
MCK
UDPCK
udp_int
external_resume
Block Diagram
AT91SAM7X512/256/128 Preliminary
Atmel Bridge
MCU
APB
Bus
to
Access to the UDP is via the APB bus interface. Read and write to the data FIFO are done by
reading and writing 8-bit values to APB registers.
The UDP peripheral requires two clocks: one peripheral clock used by the MCK domain and a
48 MHz clock used by the 12 MHz domain.
A USB 2.0 full-speed pad is embedded and controlled by the Serial Interface Engine (SIE).
The signal external_resume is optional. It allows the UDP peripheral to wake up once in system
mode. The host is then notified that the device asks for a resume. This optional feature must be
also negotiated with the host during the enumeration.
U
e
n
e
a
e
s
c
r
I
t
r
f
W
a
p
p
e
Master Clock
Domain
r
r
USB Device
RAM
FIFO
Dual
Port
Recovered 12 MHz
Domain
W
a
p
p
e
r
r
Suspend/Resume Logic
12 MHz
Interface
Engine
Serial
SIE
txoen
eopn
txd
rxdm
rxd
rxdp
6120H–ATARM–17-Feb-09
Transceiver
Embedded
USB
DM
DP