SAM7S32 Atmel Corporation, SAM7S32 Datasheet - Page 57
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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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2.6.3
ARM DDI 0029G
The relationship between ARM-state and Thumb-state registers
The Thumb-state registers relate to the ARM-state registers in the following way:
•
•
•
•
•
These relationships are shown in Figure 2-5.
Thumb-state r0–r7 and ARM-state r0–r7 are identical
Thumb-state CPSR and SPSRs and ARM-state CPSR and SPSRs are identical
Thumb-state SP maps onto the ARM-state r13
Thumb-state LR maps onto the ARM-state r14
the Thumb-state PC maps onto the ARM-state PC (r15).
Copyright © 1994-2001. All rights reserved.
Figure 2-5 Mapping of Thumb-state registers onto ARM-state registers
Program counter (PC)
Saved program status
Stack pointer (SP)
Link register (LR)
Current program
register (SPSR)
status register
Thumb state
(CPSR)
r0
r1
r2
r3
r4
r5
r6
r7
Stack pointer (r13)
Link register (r14)
ARM state
Programmer’s Model
PC (r15)
CPSR
SPSR
r10
r11
r12
r0
r1
r2
r3
r4
r5
r6
r7
r8
r9
2-11
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