C541U_99 Datasheet, PDF (26/192 Pages) Siemens Semiconductor Group – 8-BIT CMOS MICROCONTROLLER

Memory Organization
C541U
Table 3-1
Special Function Registers - Functional Blocks (cont’d)
Block Symbol Name
Address Contents after
Reset
Pow. Sav. PCON
Modes PCON1
Power Control Register
Power Control Register 1
87H
88H ⁴⁾
X00X0000B ²⁾
0XX0XXXXB ²⁾
USB
Module
EPSEL USB Endpoint Select Register
D2H
USBVAL USB Data Register
D3H
ADROFF USB Address Offset Register
D4H
GEPIR
USB Global Endpoint Interrupt Request Reg. D6H
DCR
USB Device Control Register
C1H
DPWDR USB Device Power Down Register
C2H
DIER
USB Device Interrupt Control Register
C3H
DIRR
USB Device Interrupt Request Register
C4H
FNRL
USB Frame Number Register, Low Byte
C6H
FNRH
USB Frame Number Register, High Byte C7H
EPBCn ¹⁾ USB Endpoint n Buffer Control Register
C1H
EPBSn ¹⁾ USB Endpoint n Buffer Status Register
C2H
EPIEn ¹⁾ USB Endpoint n Interrupt Enable Register C3H
EPIRn ¹⁾ USB Endpoint n Interrupt Request Register C4H
EPBAn ¹⁾ USB Endpoint n Base Address Register
C5H
EPLENn ¹⁾ USB Endpoint n Buffer Length Register
C6H
USBPWD⁴⁾ USB Power Down Register
E6H
USBDCR ⁴⁾ USB Control Register
E7H
USBDR0 ⁴⁾ USB Data Register 0
E8H
USBDR1 ⁴⁾ USB Data Register 1
E9H
USBDR2 ⁴⁾ USB Data Register 2
EAH
USBDR3 ⁴⁾ USB Data Register 3
EBH
USBDR4 ⁴⁾ USB Data Register 4
ECH
USBDR5 ⁴⁾ USB Data Register 5
EDH
USBDR6 ⁴⁾ USB Data Register 6
EEH
USBDR7 ⁴⁾ USB Data Register 7
EFH
80H
00H
00H ²⁾
00H
000X0000B
00H
00H
00H
XXH
00000XXXB
00H
20H
00H
10H ³⁾
00H
0XXXXXXXB
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
1) These registers are multiple registers (n=0-4) with the same SFR address; selection of register “n“ is done by
SFR EPSEL.
2) The reset value of ADROFF is valid only if USBVAL has not been read or written since the last hardware reset.
3) The reset value of EPIR0 is 11_H.
4) These registers are only used in USB low-speed operation.
Semiconductor Group
3-5
1997-10-01