AT83EB5114 Atmel Corporation, AT83EB5114 Datasheet - Page 15

• Manufacturer Part Number: AT83EB5114
• Manufacturer: Atmel Corporation

Specifications of AT83EB5114

• Max. Operating Frequency: 24 MHz
• Cpu: 8051-12C
• Max I/o Pins: 11
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 50
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Operating Voltage (vcc): 3.0 to 3.6
• Timers: 4
• Mask Rom (kbytes): 4
• Watchdog: Yes

Registers
Hardware Security Byte
4311C–8051–02/08
The security byte sets the starting microcontroller options and the security levels.
The default options are X1 mode, Oscillator A and divided by 16 prescaler.
Table 2. Hardware Security Byte (HSB)
Power configuration Register - HSB (S:EFh)
HSB = 1111 1X11b
Number
Bit
1-0
X2
7
6
5
4
3
2
7
Mnemonic
RST_OSC1
RST_OSC0
RST_OCLK
RST_OSC1 RST_OSC0 RST_OCLK
CKRLRV
LB1-0
Bit
X2
-
6
Description
X2 Mode
Clear to force X2 mode (CkOut = OscOut)
Set to use the prescaler mode (CkOut = OscOut / (2*(16-M)))
Oscillator bit 1 on reset and Oscillator bit 0 on reset
11: allows OSCA
10: allows OSCB
01: allows OSCC
00: reserved
Output clocking signal after RESET
Clear to start the microcontroller with a low level on P3.5 followed by an output
clocking signal on P3.5 as soon as the microcontroller is started. This signal has
is a 1/3 high 2/3 low signal. Its frequency is equal to (CKout / 3).
Set to start on normal conditions: No signal on P3.5 which is pulled up.
CKRL Reset Value
If set, the microcontroller starts with the prescaler reset value = XXXX 1000
(OscOut = CkOut/16).
If clear, the microcontroller starts with a prescaler reset value = XXXX 1111
(OscOut = CkOut/2).
Reserved
User Program Lock Bits
See Table 61 on page 81
5
4
CKRLRV
3
2
-
LB1
1
LB0
0
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