Add ATtiny20-UU (#1277)

MCU_Microchip_ATtiny.dcm

@@ -216,6 +216,12 @@ K AVR 8bit Microcontroller tinyAVR
 F http://ww1.microchip.com/downloads/en/DeviceDoc/atmel-8235-8-bit-avr-microcontroller-attiny20_datasheet.pdf
 $ENDCMP
 #
+$CMP ATtiny20-UU
+D 12MHz, 2kB Flash, 128B SRAM, No EEPROM, WLCSP-12
+K AVR 8bit Microcontroller tinyAVR
+F http://ww1.microchip.com/downloads/en/DeviceDoc/atmel-8235-8-bit-avr-microcontroller-attiny20_datasheet.pdf
+$ENDCMP
+#
 $CMP ATtiny20-XU
 D 12MHz, 2kB Flash, 128B SRAM, No EEPROM, TSSOP-14
 K AVR 8bit Microcontroller tinyAVR

MCU_Microchip_ATtiny.lib

@@ -379,6 +379,33 @@ X PA4 9 600 200 100 L 50 50 1 1 T
 ENDDRAW
 ENDDEF
 #
+# ATtiny20-UU
+#
+DEF ATtiny20-UU U 0 20 Y Y 1 F N
+F0 "U" -500 850 50 H V L BNN
+F1 "ATtiny20-UU" 100 -850 50 H V L TNN
+F2 "Package_CSP:WLCSP-12_1.403x1.555mm_P0.4mm_Stagger" 0 0 50 H I C CIN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ WLCSP*1.403x1.555mm*P0.4mm*Stagger*
+$ENDFPLIST
+DRAW
+S -500 -800 500 800 0 1 10 f
+X PA4 A1 600 200 100 L 50 50 1 1 T
+X PA1 A3 600 500 100 L 50 50 1 1 T
+X PA2 A5 600 400 100 L 50 50 1 1 T
+X PA6 B2 600 0 100 L 50 50 1 1 T
+X GND B4 0 -900 100 U 50 50 1 1 W
+X VCC B6 0 900 100 D 50 50 1 1 W
+X PA5 C1 600 100 100 L 50 50 1 1 T
+X PA7 C3 600 -100 100 L 50 50 1 1 T
+X PB1 C5 600 -400 100 L 50 50 1 1 T
+X PB2 D2 600 -500 100 L 50 50 1 1 T
+X ~RESET~/PB3 D4 600 -600 100 L 50 50 1 1 T
+X PB0 D6 600 -300 100 L 50 50 1 1 T
+ENDDRAW
+ENDDEF
+#
 # ATtiny20-XU
 #
 DEF ATtiny20-XU U 0 20 Y Y 1 F N