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EM78612
Universal Serial Bus Microcontroller
Product Specification (V1.0) 03.22.2006 •
••
• 19
(This specification is subject to change without further notice)
1 0 PS/2 Mode
1 1 USB Test Mode
IOCA [2~5] Undefined registers. The default value is 0.
IOCA [6,7] Select the operation frequency in Dual Clock Mode. Four frequencies
are available and can be chosen as Dual Clock mode for running the
MCU program.
Dual_Frq.1 Dual_Frq.0 Frequency
0 0 500Hz
0 1 4kHz
1 0 32kHz
1 1 256kHz
IOCB (Port 6 Pull-Low Control Register) Default Value: (0B_0000_0000)
7 6 5 4 3 2 1 0
PL67 PL66 PL65 PL64 PL63 PL62 PL61 PL60
IOCB [0~7] Select whether the 10K Ohm pull-low resistor of Port 6 individual pin is
connected or not.
1: Enable the pull-low function.
0: Disable the pull-low function.
IOCC (Port 6 Pull-High Control Register) Default Value: (0B_0000_0000)
7 6 5 4 3 2 1 0
PH67 PH66 PH65 PH64 PH63 PH62 PH61 PH60
IOCC [0~7] Select whether the 132K Ohm pull-high resistor of Port 6 individual pin is
connected or not.
1: Enable the pull-high function.
0: Disable the pull-high function.