Z8C520 View Datasheet(PDF) - Zilog

Part Name

Description

Manufacturer

Z8C520

1.5 MBPS USB LOW-POWER DEVICE CONTROLLER FOR MULTIPROTOCOL POINTING DEVICES

Zilog 

Z8E520/C520

1.5 MBPS USB Device Controller

Z8PLUS SYSTEM REGISTERS (Continued)

Zilog

0FB

IMR

D7

D6 D5 D4

D3 D2

D1 D0

1 = IRQ BIT N ENABLED

0 = IRQ BIT N MASKED

RESERVED (MUST BE 0)

1= GLOBAL INTERRUPTS ENABLED

0 = GLOBAL INTERRUPTS DISABLED

Figure 22. Interrupt Mask Register

0FF

STACK POINTER

D7

D6 D5 D4

D3 D2

D1 D0

NEXT STACK ADDRESSES

Figure 23. Stack Pointer

36

PRELIMINARY

DS97KEY2005

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