tmp19a44fda TOSHIBA Semiconductor CORPORATION, tmp19a44fda Datasheet - Page 395

• Manufacturer Part Number: tmp19a44fda
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Serial Channel (HSIO)
Baud Rate Generator
•
•
•
The baud rate generator generates transmit and receive clocks to determine the serial channel transfer
rate.
The baud rate generator uses the sys/2 clock.
The baud rate generator contains built-in dividers for divide by 1, (N + m/16), and 64 where N is a
number from 2 to 63 and m is a number from 0 to 15. The division is performed according to the
settings of the baud rate control registers HBR0CR <BR0ADDE> <BR3S3:0> and HBR0ADD
<BR0K3:0> to determine the resulting transfer rate.
UART Mode:
I/O interface mode:
Baud rate calculation to use the baud rate generator:
1)
2)
1)
If HBR0CR <BR0ADDE> = 0,
The setting of HBR0ADD <BR0K3:0> is ignored and the counter is divided by N where N is
the value set to HBR0CR <BR0S5:0>. (N = 1 to 64).
If HBR0CR <BR0ADDE> = 1,
The N + (16 - K)/16 division function is enabled and the division is made by using the values
N (set in HBR0CR <BR0S3:0>) and K (set in HBR0ADD<BR0K3:0>). (N = 2 to 63, K = 1 to
15)
Note
The N + (16 - K)/16 division function cannot be used in the I/O interface mode. Be sure to
divide by N, by setting HBR0CR <BR0ADDE> to "0."
UART mode
Baud rate =
The highest baud rate out of the baud rate generator is 5 Mbps when fsys is 80 MHz.
For the N values of 1 and 16, the above N+(16-K)/16 division function
is inhibited. So, be sure to set HBR0CR<BR0ADDE> to "0."
Frequency
TMP19A44(rev1.3) 15-5
divided
fsys
by the
divide
ratio
/16
TMP19A44
2010-04-01