SAM7SE256 Atmel Corporation, SAM7SE256 Datasheet - Page 556
SAM7SE256
Manufacturer Part Number
SAM7SE256
Description
Manufacturer
Atmel Corporation
Specifications of SAM7SE256
Flash (kbytes)
256 Kbytes
Pin Count
144
Max. Operating Frequency
48 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
88
Ext Interrupts
88
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
1
Twi (i2c)
1
Uart
3
Ssc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
NO
External Bus Interface
1
Dram Memory
sdram
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
3.0 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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38.2
Figure 38-1. Block Diagram
38.2.1
556
MCK
UDPCK
udp_int
Block Diagram
SAM7SE512/256/32
Atmel Bridge
MCU
APB
Signal Description
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 Master Clock domain
(MCK) and a 48 MHz clock (UDPCK) 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
also be negotiated with the host during the enumeration.
Table 38-2.
Signal Name
UDPCK
MCK
udp_int
DDP
DDM
U
e
n
e
a
e
s
c
r
I
t
r
f
Signal Names
W
a
p
p
e
Master Clock
Domain
r
r
USB Device
RAM
FIFO
Dual
Port
Description
48 MHz clock
Master clock
Interrupt line connected to the Advanced Interrupt
Controller (AIC)
USB D+ line
USB D- line
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
6222F–ATARM–14-Jan-11
Type
input
input
input
I/O
I/O
Transceiver
Embedded
USB
DDM
DDP
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