M55800A Atmel Corporation, M55800A Datasheet - Page 56

no-image

M55800A

Manufacturer Part Number
M55800A
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of M55800A

Flash (kbytes)
0 Kbytes
Pin Count
176
Max. Operating Frequency
33 MHz
Cpu
ARM7TDMI
Hardware Qtouch Acquisition
No
Max I/o Pins
58
Ext Interrupts
58
Usb Speed
No
Usb Interface
No
Spi
1
Uart
3
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
72
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
8
Self Program Memory
NO
External Bus Interface
1
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.3/5.0
Fpu
No
Mpu / Mmu
no / no
Timers
6
Output Compare Channels
6
Input Capture Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
No
AIC: Advanced
Interrupt Controller
Figure 33. Interrupt Controller Block Diagram
Note:
56
After a hardware reset, the AIC pins are controlled by the PIO Controller. They must be configured to be controlled by the
peripheral before being used.
External Interrupt Sources
Internal Interrupt Sources
AT91X40 Series
Advanced Peripheral
FIQ Source
Bus (APB)
The AT91X40 Series has an 8-level priority, individually maskable, vectored interrupt
controller. This feature substantially reduces the software and real-time overhead in
handling internal and external interrupts.
The interrupt controller is connected to the NFIQ (fast interrupt request) and the NIRQ
(standard interrupt request) inputs of the ARM7TDMI processor. The processor’s NFIQ
line can only be asserted by the external fast interrupt request input: FIQ. The NIRQ line
can be asserted by the interrupts generated by the on-chip peripherals and the external
interrupt request lines: IRQ0 to IRQ2.
The 8-level priority encoder allows the customer to define the priority between the differ-
ent NIRQ interrupt sources.
Internal sources are programmed to be level sensitive or edge triggered. External
sources can be programmed to be positive or negative edge triggered or high- or low-
level sensitive.
The interrupt sources are listed in Table 8 and the AIC programmable registers in Table
9.
Memorization
Memorization
Control
Logic
Controller
Priority
Manager
Manager
NFIQ
NIRQ
NIRQ
NFIQ
ARM7TDMI
Core
1354D–ATARM–08/02

Related parts for M55800A