Toshiba H1 Series Data Book page 320

3.14.2 Operation of Each Circuit
(1) Prescaler
There is a 6-bit prescaler for generating a clock to SIO0. The prescaler can be run by
selecting the baud rate generator as the serial transfer clock.
Table 3.14.1 shows prescaler clock resolution into the baud rate generator.
Table 3.14.1 Prescaler Clock Resolution to Baud Rate Generator
Clock gear
-
SYSCR1
<GEAR2:0>
000(1/1)
001(1/2)
010(1/4)
fc
011(1/8)
100(1/16)
XXX:Don't care
The baud rate generator selects between 4-clock inputs: φT0, φT2, φT8, and φT32
among the prescaler outputs.
-
φT0
f /4
SYS
f /8
SYS
f /16
1/4
SYS
f /32
SYS
f /64
SYS
92CZ26A-317
Clock Resolution
φT2 φT8
f /16 f /64
SYS SYS
f /32 f /128
SYS SYS
f /64 f /256
SYS SYS
f /128 f /512
SYS SYS
f /256 f /1024
SYS SYS
TMP92CZ26A
φT32
f /256
SYS
f /512
SYS
f /1024
SYS
f /2048
SYS
f /4096
SYS