SCPS253C January 2014 – September 2019 TCA5013
PRODUCTION DATA.
The clock slew rate setting register (Reg 0x08 for user card and Reg 0x18 for SAM) is used to control the rise and fall time of the CLK pin. Table 10 shows the rise and fall time corresponding to each register setting. The EMV4.3 specification, has strict restrictions on signal perturbations (overshoot and undershoot during transition). Controlling the rise time and fall time of the CLK signals can help to meet these requirements.
CLOCK SLEW RATE SETTINGS REGISTER | TYPICAL RISE TIME and FALL RATE |
---|---|
0000 | 6 |
0001 | 7 |
0010 | 9 |
0011 | 11 |
0100 | 13 |
0101 | 14 |
0110 | 15 |
0111 | 16 |
1000 | 17 |
1001 | 18 |
1010 | 19 |
1011 | 20 |
1100 | 21 |
1101 | 22 |
1110 | 23 |
1111 | 25 |