SAM7S16 Atmel Corporation, SAM7S16 Datasheet - Page 299
SAM7S16
Manufacturer Part Number
SAM7S16
Description
Manufacturer
Atmel Corporation
Specifications of SAM7S16
Flash (kbytes)
16 Kbytes
Pin Count
48
Max. Operating Frequency
55 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
21
Ext Interrupts
21
Usb Speed
No
Usb Interface
No
Spi
1
Twi (i2c)
1
Uart
2
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)
4
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
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
no / 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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29.6.6
6175L–ATARM–28-Jul-11
Read/Write Flowcharts
The following flowcharts shown in
page
give examples for read and write operations. A polling or interrupt method can be used to check
the status bits. The interrupt method requires that the interrupt enable register (TWI_IER) be
configured first.
Figure 29-13. TWI Write Operation with Single Data Byte without Internal Address
301,
Figure 29-16 on page
(CLDIV, CHDIV, CKDIV) in TWI_CWGR
- Device slave address (DADR)
Set the Master Mode register:
302,
Write ==> bit MREAD = 0
TWI_THR = Data to send
Set the Control register:
Load Transmit register
- Transfer direction bit
Read Status register
Read Status register
Figure
(Needed only once)
TWI_CR = MSEN
Transfer finished
- Master enable
TXCOMP = 1?
Set TWI clock
Figure 29-17 on page 303
TXRDY = 1?
Yes
Yes
BEGIN
29-13,
Figure 29-14 on page
No
No
and
SAM7S Series
Figure 29-18 on page 304
300,
Figure 29-15 on
299
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