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EM78M611E
Universal Serial Bus Series Microcontroller
Product Specification (V1.11) 04.20.2007
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(This specification is subject to change without further notice)
8.2.3.9 IOCF (Interrupt Mask Register) Default Value (0B_0000_0000)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
USB Host
Resume_I
E
SE2_IE
SE1_IE
Port7 state
change_1E
USB
Reset_IE
USB
Suspend_IE
EP0_IE
TCC_IE
IOCF [0~7] TCC / EP0 / USB Suspend / USB Reset / Port 7 State Change / SE1_IE /
SE2_IE / USB Host Resume interrupt enable bits. These eight bits control
the TCC interrupt function, EP0 interrupt, USB Suspend interrupt, USB
Reset interrupt, Port 7 State Change interrupt and USB Host Resume
interrupt respectively. Individual interrupt is enabled by setting its
associated control bit in the IOCF to "1."
0 : Disable Interrupt
1 : Enable Interrupt
Only when the global interrupt is enabled by the ENI instruction will the individual
interrupt work. After DISI instruction, any interrupt will not work even if the respective
control bits of IOCF are set to 1.
The USB Host Resume Interrupt works only in Dual clock mode. This is because when
the MCU is in sleep mode, it will be automatically woken up by the UDC Resume signal.
8.3 Extra Control Register
Five extra control registers are available to control some special functions. The five
registers are ERA (AD Control register), ERB (AD_LSB), ERC (AD_MSB), ERD
(AD_Rate), and ERE (PWM Control register)
Remember to set IOCA[3] before accessing these five registers. The operating method
is the same as with other control registers.
8.4 USB Application FIFOs
For USB Application, EM78M611E provides an 8-byte First-In-First-Out (FIFO) buffer
for each endpoint. The buffer cannot be accessed directly. However, a corresponding
Data Byte Pointer register for each endpoint is made available to address the individual
byte of the FIFO buffer. The content of the individual byte will map to a special register.