Atmega128rfa1 – Rainbow Electronics ATmega128RFA1 User Manual
Page 173
173
8266A-MCU Wireless-12/09
ATmega128RFA1
12.6.11 LLDRH – Low Leakage Voltage Regulator Data Register (High-Byte)
Bit
7
6
5
4
3
2
1
0
NA ($131)
Res2
Res1
Res0
LLDRH4 LLDRH3 LLDRH2 LLDRH1 LLDRH0
LLDRH
Read/Write
R
R
R
RW
RW
RW
RW
RW
Initial Value
0
0
0
0
0
0
0
0
The high-byte of the calibration data can be accessed through this register. Write
access is only enabled when the bit LLENCAL of the LLCR register is 0. Then the data
bits LLDRH4:0 directly control the output voltage of the low-leakage voltage regulator.
Higher numbers generate lower voltages. If the bit LLENCAL is 1 then the results of the
automatic calibration are stored.
•
Bit 7:5 – Res2:0 - Reserved
These bits are reserved for future use.
•
Bit 4:0 – LLDRH4:0 - High-Byte Data Register Bits
Value of the high-byte calibration result
Table 12-5 LLDRH Register Bits
Register Bits
Value
Description
0x00
Calibration limit for fast process corner/high
output voltage
LLDRH4:0
0x10
Calibration limit for slow process corner/low
output voltage
12.6.12 LLDRL – Low Leakage Voltage Regulator Data Register (Low-Byte)
Bit
7
6
5
4
3
2
1
0
NA ($130)
Res3
Res2
Res1
Res0
LLDRL3 LLDRL2 LLDRL1 LLDRL0
LLDRL
Read/Write
R
R
R
R
RW
RW
RW
RW
Initial Value
0
0
0
0
0
0
0
0
The low-byte of the calibration data can be accessed through this register. Write access
is only enabled when the bit LLENCAL of the LLCR register is 0. Then the data bits
LLDRL3:0 directly control the output voltage of the low-leakage voltage regulator.
Higher numbers generate lower voltages. The contents of this register is meaningless
when the bit LLSHORT of the LLCR register is 1. If the bit LLENCAL is 1 then the
results of the automatic calibration are stored.
•
Bit 7:4 – Res3:0 - Reserved
These bits are reserved for future use.
•
Bit 3:0 – LLDRL3:0 - Low-Byte Data Register Bits
Value of the low-byte calibration result
Table 12-6 LLDRL Register Bits
Register Bits
Value
Description
0x00
Calibration limit for fast process corner/high
output voltage
LLDRL3:0
0x08
Calibration limit for slow process corner/low
output voltage