Fujitsu MB90895 Series Hardware Manual page 472

CHAPTER 15 UART1
[Dedicated baud rate generator]
φ/1, φ/2, φ/3, φ/4,
φ
φ/5, φ/6, φ/7, φ/8
(CDCR1: MD0, DIV2 to DIV0)
[Internal timer]
TMCSR1: CSL1, CSL0
Clock selector
φ/2
φ
prescaler
16-bit reload timer 1
[External clock]
φ : Machine clock
UF : Under flow
454
Figure 15.5-1 UART Baud Rate Selector
(Clock input source select bit)
Communication prescaler
Down
counter
φ/2 φ/2
1 3 5
SCK1
Pin
SMR1: MD1, MD0
(Operating mode select bit)
SMR1: CS2 to CS0
CS2 to CS0 = "000
Division circuit
[Clock synchronous]
Select any of 1/1, 1/2,
1/4, 1/8, 1/16, 1/32
[Asynchronous]
Select internal fixed
dividing ratio
CS2 to CS0 = "110
UF
1/1 [Clock synchronous]
1/16 [Asynchronous]
CS2 to CS0 = "111
1/1 [Clock synchronous]
1/16 [Asynchronous]
Clock selector
" to "101 "
B B
"
B
Baud rate
"
B