AT83EB5114 Atmel Corporation, AT83EB5114 Datasheet - Page 80

• 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

AT8xEB5114 ROM
ROM Structure
Hardware Configuration Byte
80
AT89/83EB5114
The AT8xEB5114 ROM memory is divided in two different arrays:
•
•
The configuration byte sets the starting microcontroller options and the security levels.
The starting default options are X1 mode, Oscillator A.
Table 60. Hardware Security Byte (HSB)
HSB (S:EFh)
Power configuration Register
HSB = 1111 XX11b
Note:
Number
Bit
1-0
the code array: 4 Kbytes.
the configuration byte:1 byte.
X2
7
6
5
4
3
2
7
Whatever the value of RST_OSC, the XTAL1 input is always validated in order to enter in
test modes.
RST_OSC1 RST_OSC0 RST_OCLK
Mnemonic
RST_OSC1
RST_OSC0
RST_OCLK
CKRLRV
LB1-0
6
Bit
X2
-
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
Oscillator bit 0 on reset
Oscillator bit on reset
11: allow OSCA
10: allow OSCB
01: allow 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
3
-
2
-
LB1
1
4311C–8051–02/08
LB0
0