Data Sheet
ADuC7120/ADuC7121
Grounding and Board Layout Recommendations .............. 100
Clock Oscillator........................................................................ 101
Outline Dimensions......................................................................102
Ordering Guide .........................................................................102
REVISION HISTORY
9/2017—Rev. C to Rev. D
Changes to Table 89 ........................................................................63
Changes to Table 96 ........................................................................67
Changes to Table 97 ........................................................................68
Added Hardware Design Consideration Section........................95
Added ADuC7120.............................................................. Universal
Changed –40°C to +95°C to –40°C to +105°C.......... Throughout
Changes to Features Section and Figure 1 .....................................1
Changes to General Description Section.......................................4
Changes to Specifications Section and Table 1..............................5
Added Figure 7 and Table 10; Renumbered Sequentially..........16
Changes to Table 11 ........................................................................20
Changes to Table 12 and Table 14.................................................28
Changes to Table 25 ........................................................................30
Changes to Table 32 to Table 35 ....................................................35
Change to Table 40..........................................................................36
Change to Flash/EE Memory Overview Section, Flash/EE
Memory Reliability Section, and Serial Downloading (In Circuit
Programming) Section ...................................................................40
Changes to FEE0STA Register Section and FEE1STA Register
Section ..............................................................................................42
Changes to Execution from Flash/EE Section and Table 50 .....44
Changes to DACs Section and Figure 29 .....................................46
Added Table 55 ................................................................................47
Changes to Table 56 ........................................................................47
Added Table 58 and Table 60.........................................................48
Changes to Table 59 ........................................................................48
Changes to External Clock Selection Section and Table 71 ......53
Changes to Table 80 ........................................................................57
Changes to Slave Mode Section.....................................................66
Changes Table 102 and I2C Slave Status Register Section..........71
Changes to Table 109 ......................................................................79
Changes to Table 126 ......................................................................87
Changes to IRQCLRE Register Section........................................88
Changes to Figure 42 and Figure 43 .............................................99
Changes to Figure 44 to Figure 48 ..............................................100
Changes to Figure 49 and Figure 50 ...........................................101
Changes to Ordering Guide.........................................................102
3/2013—Rev. A to Rev. B
Changes to Table 9 ..........................................................................19
Changes to Table 11 ........................................................................24
Changes to Reset Operation Section............................................40
Added RSTCFGKEY0 Register and RSTCFGKEY1 Register
Sections.............................................................................................40
Added Table 49 and Table 50; Renumbered Sequentially .........40
Changed IREF = 370.37 μA to IREF = 380 μA..................................44
Changes to Figure 32 ......................................................................44
Changes to Table 57 ........................................................................45
Changes to Table 64 ........................................................................46
3/2012—Rev. 0 to Rev. A
Changed IDAC2 Full-Scale Output to 45 mA ...........Throughout
Changed IDAC3 Full-Scale Output to 80 mA ...........Throughout
Added BUFFER VREF Out Parameter to Table 1,
Specifications Section.......................................................................6
Changes to IDAC3 and IDAC2, Full-Scale Output Parameter,
Table 1, Specifications Section.........................................................6
Changes to Flash/EE Memory Section.........................................35
Changes to PADC0x/PADC1x Pins Section ...............................28
Added New Figure 15, Renumbered Sequentially......................28
Changes to Temperature Sensor Section .....................................29
Changes to Current Output DACs (IDAC) Section...................43
Changes to Table 58 ........................................................................45
Change to External Interrupts (IRQ0 to IRQ5) Section
Heading ............................................................................................84
Added Hour:Minute:Second:1/128 Format Section...................86
Added New Table 122, Renumbered Sequentially......................86
Changes to Timer3 Control Register Section..............................91
Changes to Table 130......................................................................92
11/2014—Rev. B to Rev. C
Changes to Flash/EE Memory Section.........................................23
Changes to PADC0x/PADC1x Pins Section................................28
Changes to Flash/EE Memory Section and Serial Downloading
(In-Circuit Programming) Section...............................................35
Changes to Flash/EE Memory Security Section .........................36
Changes to Table 41, Table 42, and FEE0STA Default Value ....37
Changes to I2C Peripherals Section ..............................................62
1/2011—Revision 0: Initial Version
Rev. D | Page 3 of 102
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