4559 Datasheet, PDF (52/148 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4559 Group
• Key-on wakeup control register K0
• Key-on wakeup control register K1
• Key-on wakeup control register K2
• Key-on wakeup control register K3
• Pull-up control register PU0
• Pull-up control register PU1
• Pull-up control register PU2
• Pull-up control register PU3
• Port output structure control register FR0
• Port output structure control register FR1
• Port output structure control register FR2
• Port output structure control register FR3
• High-order bit reference enable flag (UPTF)
• Carry flag (CY)
• Register A
• Register B
• Register D
• Register E
• Register X
• Register Y
• Register Z
• Stack pointer (SP)
• Operation source clock
• Ceramic resonator circuit
• RC oscillation circuit
• Quartz-crystal oscillator
Fig 52. Internal state at reset (2)
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0
0
0000
0000
×××
××××××××
0000
0000
××
111
On-chip oscillator
(oeprating)
Oeprating
Stop
Oeprating
“X” represents undefined.
Rev.1.04 Aug 23, 2007 Page 52 of 146
REJ03B0188-0104