Cypress Semiconductor EZ-Host CY7C67300 User Manual download pdf (Page 42)

CY7C6730

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Reset Strobe (Bit 0)

The Reset Strobe is a write-only bit that resets the Watchdog timer count. It must be set to ‘1’ before the count expires to avoid

a Watchdog trigger

1: Reset Count

Reserved

All reserved bits should be written as ‘0’.

7.3.2 Timer n Register [R/W]

• Timer 0 Register 0xC010.

• Timer 1 Register 0xC012.

Figure 7-16. Timer n Register

The Timer n Register sets the Timer n count. Both Timer 0 and Timer 1 decrement by one every 1-µs clock tick. Each can provide

an interrupt to the CPU when the timer reaches zero.

Count (Bits [15:0])

The Count field sets the Timer count.

7.4 General USB Registers

There is one set of register dedicated to general USB control. This set consists of two identical registers, one for Host/Device

Port 1 and one for Host/Device Port 2. This register set has functions for both USB host and USB peripheral options and is covered

in this section and summarized in Figure 7-8. USB Host only registers are covered in section 4.5, and USB device-only registers

are covered in section 7.2.

7.4.1 USB n Control Register [R/W]

• USB 1 Control Register 0xC08A.

• USB 2 Control Register 0xC0AA.

Figure 7-18. USB n Control Register

Bit # 15 14 13 12 11 10 9 8

Field Count...

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Default 1 1 1 1 1 1 1 1

Bit # 7 6 5 4 3 2 1 0

Field ...Count

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Default 1 1 1 1 1 1 1 1

USB n Control Register 0xC08A / 0xC0AA R/W

Figure 7-17. General USB Registers

Bit # 15 14 13 12 11 10 9 8

Field Port B

D+

Status

Port B

D–

Status

Port A

D+

Status

Port A

D–

Status

LOB LOA Mode

Select

Port B

Resistors

Enable

Read/Write R R R R R/W R/W R/W R/W

Default X X X X 0 0 0 0

Bit # 7 6 5 4 3 2 1 0

Field Port A

Resistors

Enable

Port B

Force D±

State

Port A

Force D±

State

Suspend

Enable

Port B

SOF/EOP

Enable

Port A

SOF/EOP

Enable

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Default 0 0 0 0 0 0 0 0

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 119 120

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Cypress Semiconductor EZ-Host CY7C67300 User Manual Page 42

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