Datasheet
ADuC7128/ADuC7129
Rev. 0 | Page 50 of 92
Table 58. Operating Modes
Mode Core Peripherals PLL XTAL/T2/T3 XIRQ Start-Up/Power-On Time
Active On On On On On 130 ms at CD = 0
Pause On On On On 24 ns at CD = 0; 3.06 µs at CD = 7
Nap On On On 24 ns at CD = 0; 3.06 µs at CD = 7
Sleep On On 1.58 ms
Stop On 1.7 ms
Table 59. Typical Current Consumption at 25°C
PC[2:0] Mode CD = 0 CD = 1 CD = 2 CD = 3 CD = 4 CD = 5 CD = 6 CD = 7
000 Active 33.1 21.2 13.8 10 8.1 7.2 6.7 6.45
001 Pause 22.7 13.3 8.5 6.1 4.9 4.3 4 3.85
010 Nap 3.8 3.8 3.8 3.8 3.8 3.8 3.8 3.8
011 Sleep 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
100 Stop 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
MMRs and Keys
To prevent accidental programming, a certain sequence must be
followed when writing in the PLLCON and POWCON registers
(see
Table 60).
PLLKEYx Register
Name Address Default Value Access
PLLKEY1 0xFFFF0410 0x0000 W
PLLKEY2 0xFFFF0418 0x0000 W
PLLCON Register
Name Address Default Value Access
PLLCON 0xFFFF0414 0x21 R/W
POWKEYx Register
Name Address Default Value Access
POWKEY1 0xFFFF0404 0x0000 W
POWKEY2 0xFFFF040C 0x0000 W
POWCON Register
Name Address Default Value Access
POWCON 0xFFFF0408 0x0003 R/W
Table 60. PLLCON and POWCON Write Sequence
PLLCON POWCON
PLLKEY1 = 0xAA POWKEY1 = 0x01
PLLCON = 0x01 POWCON = user value
PLLKEY2 = 0x55 POWKEY2 = 0xF4
Table 61. PLLCON MMR Bit Designations
Bit Value Name Description
7:6 Reserved.
5 OSEL 32 kHz PLL Input Selection.
Set by user to use the internal
32 kHz oscillator.
Set by default.
Cleared by user to use the
external 32 kHz crystal.
4:2 Reserved.
1:0 MDCLK Clocking Modes.
00 Reserved.
01 PLL. Default configuration.
10 Reserved.
11 External clock on P0.7 pin.
Table 62. POWCON MMR Bit Designations
Bit Value Name Description
7 Reserved.
6:4 PC Operating Modes.
000 Active mode.
001 Pause mode.
010 Nap.
011
Sleep mode. IRQ0 to IRQ3 and Timer2
can wake up the
ADuC7128/ADuC7129.
100 Stop mode.
Others Reserved.
3 RSVD Reserved.
2:0 CD CPU Clock Divider Bits.
000 41.779200 MHz.
001 20.889600 MHz.
010 10.444800 MHz.
011 5.222400 MHz.
100 2.611200 MHz.
101 1.305600 MHz.
110 654.800 kHz.
111 326.400 kHz.