Owners manual

Interfaces
H3 Datasheet(Revision1.2) Copyright© 2015 Allwinner Technology Co.,Ltd.All Rights Reserved. Page 560
clock. The BUAD rate is given by the following equation:
2 * ( 1)
sy sc lk
f
B A U D
B A U D D IV


B A U D
-- Baud rate of the data stream between Smart Card and Reader.
The duration of one bit, Elementary Time Unit (ETU), is defined in the ISO/IEC 7816-3 specification. During the first
answer to reset response after the cold reset, the initial ETU must be equal to 372 Smart Card Clock Cycles.
1 3 7 2
sc c lk
E T U
B A U D f

In this case, the BAUDDIV should be
3 7 2 *
1 3 7 2 * ( 1) 1
2*
sy sclk
sc c lk
f
B A U D D IV S C C D IV
f
    
.
After the ATR is completed, the ETU can be changed according to Smart Card abilities.
11
*
sc clk
F
E T U
B A U D D f

Parameters F and D are defined in the ISO/IEC 7816-3 Specification.
8.8.4.2. SCIO Pad Configuration
Figure 8-18. SCIO Pad Configuration Diagram
8.8.5. SCR Register List
Module Name
Base Address
SCR
0x01C2C400
Register Name
Offset
Description
confidential