Z8E520 Datasheet, PDF (19/43 Pages) Zilog, Inc. – 1.5 MBPS USB Device Controller

Zilog
Z8E520/C520
1.5 MBPS USB Device Controller
Register File. The register file consists of the following: group C, Configuration Registers in group D, Virtual Reg-
160 General-Purpose Registers in group 0–7, SIE Buffers isters in group E and System Registers in Group F
in group 8–A, SIE Control in group B, Timer/Counters in (Figure 12).
1
F
System Registers
E
Virtual Registers
D
I/O Configuration
C
Timer/Counter
B
SIE Control
A
XMIT Buffer
9
RECEIVE Buffer
8
General Purpose RAM
7
6
5
General-Purpose
4
Registers
3
2
1
0
A
Depends on
EP0 IN Buffer
9
EP Mode
EP0 OUT Buffer
(See Table Below)
8
EP0 SETUP Buffer
SIE Buffers
(for PS/2 or RS232-C Mode)
SIE Buffers
(for USB Mode)
Figure 12. Register Files
EP Mode
000
001
010
011
100
101
110
111
Table 9. EP Modes for SIE Buffer (In USB Mode)
Description
Buffer Address
EP1 OFF, EP2 OFF
EP1 IN, EP2 OFF
EP1 OUT, EP2 OFF
EP1 CONTROL
EP1 OUT, EP2 OUT
EP1 IN, EP1 OUT
EP1 OUT, EP1 IN
EP1 IN, EP2 IN
0x88–0x8F
GPR
GPR
GPR
EP1 SETUP Buffer
GPR
GPR
GPR
GPR
0x98–0x9F
GPR
GPR
GPR
EP1 OUT Buffer
EP2 OUT Buffer
EP1 OUT Buffer
EP1 IN Buffer
EP2 IN Buffer
0xA8–0xAF
GPR
EPI IN Buffer
EP1 OUT Buffer
EP1 IN Buffer
EP1 OUT Buffer
EP1 IN Buffer
EP1 OUT Buffer
EP1 IN Buffer
DS97KEY2005
PRELIMINARY
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