SAM7S32 Atmel Corporation, SAM7S32 Datasheet - Page 668
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SAM7S32
Manufacturer Part Number
SAM7S32
Description
Manufacturer
Atmel Corporation
Specifications of SAM7S32
Flash (kbytes)
32 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)
8
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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40.12 SAM7S128 Errata - Revision B Parts
40.12.1
40.12.1.1
40.12.1.2
40.12.1.3
40.12.1.4
40.12.1.5
668
SAM7S Series
Analog-to-Digital Converter (ADC)
ADC: DRDY Bit Cleared
ADC: DRDY not Cleared on Disable
ADC: DRDY Possibly Skipped due to CDR Read
ADC: Possible Skip on DRDY when Disabling a Channel
ADC: GOVRE Bit is not Updated
Refer to
Note: AT91SAM7S128 Revision B chip ID is: 0x270A 0741.
The DRDY Flag should be clear only after a read of ADC_LCDR (Last Converted Data Regis-
ter). A read of any ADC_CDRx register (Channel Data Register) automatically clears the DRDY
flag.
None
When reading LCDR at the same instant as an end of conversion, with DRDY already active,
DRDY is kept active regardless of the enable status of the current channel. This sets DRDY,
whereas new data is not stored.
None
Reading CDR for channel “y” at the same instant as an end of conversion on channel “x” with
EOC[x] already active, leads to skipping to set the DRDY flag if channel “x” is enabled.
Use of DRDY functionality with access to CDR registers should be avoided.
DRDY does not rise when disabling channel “y” at the same time as an end of “x” channel con-
version, although data is stored into CDRx and LCDR.
None.
Read of the Status Register at the same instant as an end of conversion leads to skipping the
update of the GOVRE (general overrun) flag. GOVRE is neither reset nor set.
For example, if reading the status while an end of conversion is occurring and:
None
1. GOVRE is active but DRDY is inactive, does not correspond to a new general overrun
2. GOVRE is inactive but DRDY is active, does correspond to a new general overrun con-
Problem Fix/Workaround:
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
Problem Fix/Workaround
condition but the GOVRE flag is not reset.
dition but the GOVRE flag is not set.
Section 40.1 “Marking” on page
591.
6175L–ATARM–28-Jul-11
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