TMP91C829 Datasheet, PDF (121/204 Pages) Toshiba Semiconductor – Original CMOS 16-Bit Microcontroller

TMP91C829
3.10.2 Operation of Each Circuit
(1) Prescaler, prescaler clock select
There is a 6-bit prescaler for waking serial clock. The clock selected using
SYSCR<PRCK1:0> is divided by 4 and input to the prescaler as φT0. The prescaler can
be run by selecting the baud rate generator as the waking serial clock.
Table 3.10.2 shows prescaler clock resolution into the baud rate generator.
Table 3.10.2 Prescaler Clock Resolution to Baud Rate Generator
Select Prescaler Clock
<PRCK1:0>
00
(f_FPH)
Gear Value
<GEAR2:0>
000 (fc)
001 (fc/2)
010 (fc/4)
011 (fc/8)
100 (fc/16)
Prescaler Output Clock Resolution
φT0 φT2 φT8 φT32
2²/fc
2³/fc
2⁴/fc
2⁴/fc
2⁵/fc
2⁶/fc
2⁶/fc
2⁷/fc
2⁸/fc
2⁸/fc
2⁹/fc
2¹⁰/fc
2⁵/fc
2⁶/fc
2⁷/fc
2⁸/fc
2⁹/fc
2¹⁰/fc
2¹¹/fc
2¹²/fc
10
(fc/16 clock)
XXX
−
2⁸/fc
2¹⁰/fc
2¹²/fc
X: Don’t care, −: Cannot be used
The baud rate generator selects between 4 clock inputs: φT0, φT2, φT8, and φT32
among the prescaler outputs.
91C829-119
2006-03-15