M42800A Atmel Corporation, M42800A Datasheet - Page 147

• Manufacturer Part Number: M42800A
• Manufacturer: Atmel Corporation

Specifications of M42800A

• Flash (kbytes): 0 Kbytes
• Pin Count: 144
• Max. Operating Frequency: 33 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 54
• Ext Interrupts: 54
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• 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

17.22 USART Receive Pointer Register
Name:
Access Type:
Offset:
Reset Value:
• RXPTR: Receive Pointer
RXPTR must be loaded with the address of the receive buffer.
17.23 USART Receive Counter Register
Name:
Access Type:
Offset:
Reset Value:
• RXCTR: Receive Counter
RXCTR must be loaded with the size of the receive buffer.
0: Stop Peripheral Data Transfer dedicated to the receiver.
1-65535: Start Peripheral Data transfer if RXRDY is active.
1779D–ATARM–14-Apr-06
31
23
15
31
23
15
7
–
–
7
30
22
14
30
22
14
US_RPR
Read/Write
0x30
0x0
6
US_RCR
Read/Write
0x34
0x0
–
–
6
29
21
13
29
21
13
5
–
–
5
28
20
12
28
20
12
4
–
–
4
RXPTR
RXPTR
RXPTR
RXPTR
RXCTR
RXCTR
27
19
11
27
19
11
3
–
–
3
26
18
10
26
18
10
2
–
–
2
AT91M42800A
25
17
25
17
9
1
–
–
9
1
24
16
24
16
8
0
–
–
8
0
147