SAM7S161 Atmel Corporation, SAM7S161 Datasheet - Page 171

• Manufacturer Part Number: SAM7S161
• Manufacturer: Atmel Corporation

Specifications of SAM7S161

• Flash (kbytes): 16 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 55 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• 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

6.20
ARM DDI 0029G
Instruction speed summary
Due to the pipelined architecture of the CPU, instructions overlap considerably. In a
typical cycle, one instruction can be using the data path while the next is being decoded
and the one after that is being fetched. For this reason Table 6-23 presents the
incremental number of cycles required by an instruction, rather than the total number of
cycles for which the instruction uses part of the processor. Elapsed time, in cycles, for
a routine can be calculated from these figures listed in Table 6-23. These figures assume
that the instruction is actually executed. Unexecuted instructions take one cycle.
If the condition is not met then all instructions take one S-cycle. The cycle types N, S,
I, and C are described in Bus cycle types on page 3-4.
In Table 6-23:
•
•
•
b is the number of cycles spent in the coprocessor busy-wait loop
m is:
—
—
—
n is the number of words transferred.
Copyright © 1994-2001. All rights reserved.
1 if bits [32:8] of the multiplier operand are all zero or one
2 if bits [32:16] of the multiplier operand are all zero or one
3 if bits [31:24] of the multiplier operand are all zero or all one
Instruction
Data Processing
MSR, MRS
LDR
STR
LDM
STM
SWP
B,BL
SWI, trap
MUL
MLA
Table 6-23 ARM instruction speed summary
Cycle count
S
S
S+N+I
2N
nS+N+I
(n-1)S+2N
S+2N+I
2S+N
2S+N
S+mI
S+(m+1)I
Instruction Cycle Timings
Additional
+I for SHIFT(Rs)
+S + N if R15 written
-
+S +N if R15 loaded
-
+S +N if R15 loaded
-
-
-
-
-
-
6-29