Z8E520 Datasheet, PDF (27/43 Pages) Zilog, Inc. – 1.5 MBPS USB Device Controller

Zilog
Z8E520/C520
1.5 MBPS USB Device Controller
ADDR
NAME
D7
D6
D5
D4
D3
D2
D1
D0
1
B0
PORT A
A7
A6
A5
A4
A3
A2
A1
A0
B1
PORT B
B7
B6
B5
B4
B3
B2
B1
B0
B2
B3 ^{SIE MODE}
B4
LOW
B5 PRIORITY
INTR
PB7
INTR
B6
LOW
PRIORITY
PB7
MSK
MASK
HIGH
B7 PRIORITY
INTR
HIGH
B8 PRIORITY
MASK
B9
COMM
CSR
BA
MODE 3:0
1200
BAUD
SERIAL
PS/2
USB
PB6
INTR
PB6
MSK
HOST COMM BYTE XMIT
ABORT ERROR RCV ^DONE
SAME AS LOW PRIORITY INTR
OVER- RCV
RUN COMM
ERROR ERROR
RCV
DONE
SAME AS HIGH PRIORITY INTR
RCV
READY
XMIT
READY
BB
PACKET
SIZE
BYTE
BC _OFFSETS
BD
RCV PACKET SIZE
LAST BYTE RECEIVED OFFSET
XMIT PACKET SIZE
NEXT SEND BYTE OFFSET
BE
BF
Figure 16. COMM Registers (Non-USB Modes: B0–BF)
DS97KEY2005
PRELIMINARY
27