Allwinner A20 - Page 225

A20 User Manual (Revision 1.2) Copyright © 2013 Allwinner Technology Co., Ltd. All Rights Reserved. Page 225 / 812
Bit
Read/Write
Default
Description
31:0
R/W
0
AES-CTS ciphertext length in byte unit
The value of ‘0’ means no data.
1.16.4.9. SECURITY SYSTEM RX FIFO REGISTER
Offset: 0x200
Register Name: SS_RX
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:0
W
0
SS_RX_FIFO
32-bits RX FIFO for Input
1.16.4.10. SECURITY SYSTEM TX FIFO REGISTER
Offset: 0x204
Register Name: SS_TX
Default Value: 0x0000_0000
Bit
Read/Write
Default
Description
31:0
R
0
SS_TX_FIFO
32-bits TX FIFO for Output
1.16.4.11. SECURITY SYSTEM CLOCK REQUIREMENT
Clock Name
Description
Requirement
ahb_clk
AHB bus clock
>=24MHz
ss_clk
SS serial clock
<= 150MHz