upd70f3422gj-gae-qs-ax Renesas Electronics Corporation., upd70f3422gj-gae-qs-ax Datasheet - Page 572

• Manufacturer Part Number: upd70f3422gj-gae-qs-ax
• Description: 32-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

Chapter 17
572
Initial Value
Address
Caution
Access
17.7.3 Baud rate calculation
Note
(2)
PRSCMn - Prescaler compare registers
The PRSCMn registers are 8-bit compare registers.
This register can be read/written in 8-bit units.
<BRG_base> + 1
00
1.
2.
The transmission/reception clock is generated by dividing the main clock. The
baud rate generated from the main clock is obtained by the following equation.
f
f
k:
N:
Preliminary User’s Manual U17566EE1V2UM00
BRGn
SPCLK1
PRSCMn7
H
Do not rewrite the PRSCMn register during operation.
Set the PRSCMn register before setting the PRSMn.BGCEn bit to 1.
. This register is cleared by any reset.
f
7
:
BRGn
:
=
PRSCMn6
------------------------- -
2
f
k
6
SPCLK1
BRGn count clock
Main clock oscillation frequency
PRSMn.BGCSn[1:0] register setting value (0 ≤ k ≤ 3)
PRSCMn.PRSCMn[7:0] register value
if PRSCMn = 00H: N = 256.
×
N
H
×
2
PRSCMn5
5
PRSCMn4
4
R/W
PRSCMn3
3
Clocked Serial Interface (CSIB)
PRSCMn2
2
PRSCMn1
1
PRSCMn0
0