ZHCSJU4I November 2006 – September 2018 CC1020
PRODUCTION DATA.
The data rate (baud rate) is programmable and depends on the crystal frequency and the programming of the CLOCK (CLOCK_A and CLOCK_B) registers.
The baud rate (B.R.) is given by Equation 1.
Where:
DIV1 and DIV2 are given by the value of MCLK_DIV1 and MCLK_DIV2.
Table 5-4 shows some possible data rates as a function of crystal frequency in synchronous mode. In asynchronous transparent UART mode any data rate up to 153.6 kBaud can be used.
| MCLK_DIV2[1:0] | DIV2 |
|---|---|
| 00 | 1 |
| 01 | 2 |
| 10 | 4 |
| 11 | 8 |
| MCLK_DIV1[2:0] | DIV1 |
|---|---|
| 000 | 2.5 |
| 001 | 3 |
| 010 | 4 |
| 011 | 7.5 |
| 100 | 12.5 |
| 101 | 40 |
| 110 | 48 |
| 111 | 64 |
| DATA RATE
[kBaud] |
CRYSTAL FREQUENCY [MHz] | ||||||
|---|---|---|---|---|---|---|---|
| 4.9152 | 7.3728 | 9.8304 | 12.288 | 14.7456 | 17.2032 | 19.6608 | |
| 0.45 | X | X | |||||
| 0.5 | X | ||||||
| 0.6 | X | X | X | X | X | X | X |
| 0.9 | X | X | |||||
| 1 | X | ||||||
| 1.2 | X | X | X | X | X | X | X |
| 1.8 | X | X | |||||
| 2 | X | ||||||
| 2.4 | X | X | X | X | X | X | X |
| 3.6 | X | X | |||||
| 4 | X | ||||||
| 4.096 | X | X | |||||
| 4.8 | X | X | X | X | X | X | X |
| 7.2 | X | X | |||||
| 8 | X | ||||||
| 8.192 | X | X | |||||
| 9.6 | X | X | X | X | X | X | X |
| 14.4 | X | X | |||||
| 16 | X | ||||||
| 16.384 | X | X | |||||
| 19.2 | X | X | X | X | X | X | X |
| 28.8 | X | X | |||||
| 32 | X | ||||||
| 32.768 | X | X | |||||
| 38.4 | X | X | X | X | X | X | X |
| 57.6 | X | X | |||||
| 64 | X | ||||||
| 65.536 | X | ||||||
| 76.8 | X | X | X | X | X | X | X |
| 115.2 | X | X | |||||
| 128 | X | ||||||
| 153.6 | X | X | X | X | X | ||