M42800A Atmel Corporation, M42800A Datasheet - Page 117

• 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

USART Receiver Holding Register
Name:
Access Type:Read Only
Reset Value: 0
Offset:
• RXCHR: Received Character
Last character received if RXRDY is set. When number of data bits is less than 8 bits, the bits are right-aligned.
All non-significant bits read zero.
USART Transmitter Holding Register
Name:
Access Type:Write Only
Offset:
• TXCHR: Character to be Transmitted
Next character to be transmitted after the current character if TXRDY is not set. When number of data bits is less than 8
bits, the bits are right-aligned.
1354D–ATARM–08/02
31
23
15
31
23
15
–
–
–
–
–
–
7
7
US_RHR
0x18
US_THR
0x1C
30
22
14
30
22
14
–
–
–
6
–
–
–
6
29
21
13
29
21
13
–
–
–
5
–
–
–
5
28
20
12
28
20
12
–
–
–
–
–
–
4
4
RXCHR
TXCHR
27
19
27
19
11
11
–
–
–
–
–
–
3
3
26
18
10
26
18
10
–
–
–
2
–
–
–
2
AT91X40 Series
25
17
25
17
–
–
9
–
1
–
–
9
–
1
24
16
24
16
–
–
–
–
–
–
8
0
8
0
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