Allwinner A20 - Page 222

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 222 / 812
1.16.4.3. SECURITY SYSTEM IV[N] REGISTER
Offset: 0x24 +4*n
Register Name: SS_IV[n]
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:0
R/W
0
SS_IV_VALUE
Initialization Vector (IV[n]) Input Value (n= 0~3)
1.16.4.4. SECURITY SYSTEM COUNTER[N] REGISTER
Offset: 0x34 +4*n
Register Name: SS_CNT[n]
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:0
R/W
0
SS_CNT_VALUE
Counter Input Value (n= 0~3)
1.16.4.5. SECURITY SYSTEM FIFO CONTROL/ STATUS REGISTER
Offset: 0x44
Register Name: SS_FCSR
Default Value: 0x6000_0F0F
Bit
Read/Write
Default
Description
31
/
/
/
30
R
0x1
RXFIFO_STATUS
RX FIFO Empty
0: No room for new word in RX FIFO
1: More than one room for new word in RX FIFO (>= 1 word)
29:24
R
0x20
RXFIFO_EMP_CNT
RX FIFO Empty Space Word Counter
23
/
/
/
22
R
0
TXFIFO_STATUS
TX FIFO Data Available Flag
0: No available data in TX FIFO
1: More than one data in TX FIFO (>= 1 word)
21:16
R
0
TXFIFO_AVA_CNT
TX FIFO Available Word Counter