IXXBB1 Fujitsu Microelectronics, Inc., IXXBB1 Datasheet - Page 76

• Manufacturer Part Number: IXXBB1
• Description: 32-bit Proprietary Microcontroller Cmos Fr60 Mb91301 Series
• Manufacturer: Fujitsu Microelectronics, Inc.

76
MB91301 Series
8. U-TIMER (16 bit timer for UART baud rate generation)
Block Diagram
The U-TIMER is a 16-bit timer used to generate the baud rate for the UART. Any desired baud rate can be set
using the combination of the chip operating frequency and U-TIMER reload value.
The U-TIMER can also be used as an interval timer by generating an interrupt from a count underflow event.
The MB91301 series has three U-TIMER channels. When used as an interval timer, two U-TIMER channels can
be connected in cascade for a maximum count interval of up to 2
Cascade connection is only available for ch0 and ch1 or ch0 and ch2.
(Peripheral clock)
(CLKP)
under flow U-TIMER 1
15
15
ch0 only
MUX
UTIMR (reload register)
UTIM (timer)
clock
load
32
underflow
.
f.f.
0
0
to UART
control