+User interface/Main (English) for v1.0
+
+*Panel
+ 7 8 9 A POW.LAMP POWER
+ 4 5 6 B TUN.LAMP
+ 1 2 3 C FM.LAMP
+ 0 F E D AM.LAMP
+
+ * 0 〜 9 : Numeric or up/down , commands.
+ * A : Special key.
+ * B : Special key,Cancel on numeric mode.
+ * C : Special key.
+ * D : Special key.
+ * E : Special key.
+ * F : Normally help, ENTER on numeric mode.
+
+ * POWER : Turn on/off power only in top screen, you need long-press.
+ * TUN.LAMP : Tuning lamp connect to radio chip directly.
+ * POW.LAMP : Turning on when main power is truned on.
+ * AM.LAMP : Turning on when AM(MW/LW/SW) mode.
+ * FM.LAMP : Turning on when FM/TV mode.
+
+* State change diagram
+ Main screen(UP/DOWN) -> '5' is manu → '0' is setting.
+
+* Main screen
+
+ *Enable to repeat on keyin.
+
+ Key Function
+ 0 BAND WIDTH.
+ 1 Down frequency(slow).
+ 2 Down band.
+ 3 Up frequency(slow).
+ 4 Down frequency(medium).
+ 5 GO TO MENU.
+ 6 UP frequency(medium).
+ 7 Down frequency(fast).
+ 8 Up band.
+ 9 Up frequency(fast).
+ A Toggle AM/FM.
+ B GO TO Up/Down user frequencies.
+ C GO TO Scan mode.
+ D Change band-width when FM mode.
+ E Toggle ON/OFF for LCD Backlight.
+ F Help.
+
+* Scan mode
+ 4 Lower scan.
+ 6 Upper scan.
+ A Abort scan , and EXIT TO Main screen.
+ F EXIT TO Main screen without aborting.
+
+ * When progress of scanning, display '>' at (0,0) of Screen.
+ When complete, display ' '.
+
+ * In progress of scanning, you can abort/up/down/EXIT scanning.
+
+* Menu screen(5)
+
+ * Keyin is *not* repeated.
+ 0 GO TO Setting screen.
+ 1 Call band directly.
+ 2
+ 3 Call frequency directly.
+ 4 Call user ch directly.
+ 5 Cancel.
+ 6 Set user CH.
+ 7 TURN OFF POWER.
+ 8 Set audio volume.
+ 9 Set bandwidth(Narrow/Wide).
+ A Toggle AM/FM.
+ B Cancel.
+ C Set user-defined band.
+ D Call user-defined band.
+ E
+ F Help.
+
+*Setting screen(5->0)
+
+ * Keyin is *not* repeated.
+ 0 TURN OFF POWER.
+ 1
+ 2
+ 3 Luminance of LCD BACKLIGHT.
+ 4 Set FM-Bandwidth(0-3).
+ 5 Cancel.
+ 6
+ 7 Set FM CNR ratio(0-3).
+ 8 Set AM CNR ratio(0-3).
+ 9 Set FM threshold(0-3).
+ A Load settings from EEPROM.
+ B
+ C Save current settings to EEPROM.
+ D Reset to default value.
+ E Width of LCD BACKLIGHT.
+ F Help.
+
+* Key assign of NUMERIC MODE
+ 0〜9 Input Numeric.
+ F ENTER
+ A Delete one digit(BS).
+ B Cancel.
+ E Move to right (down) digit.
+ D Move to left (up) digit.
+
+* Up/Down of USER frequencies(Main screen ->B)
+ 8 1ch. up
+ 2 1ch. down
+ D Reset frequency before Up/Down.
+ 5 EXIT.
+ A EXIT.
+ F Help(unimplemented).
+
+Aug 23, 2013 K.Ohta <whatisthis.sowhat _at_ gmail.com>
+