TMP91xy16FG Toshiba, TMP91xy16FG Datasheet - Page 25

• Manufacturer Part Number: TMP91xy16FG
• Manufacturer: Toshiba

Specifications of TMP91xy16FG

• Package: LQFP100
• Rom Types(m=mask,p=otp, F=flash,e=eeprom): Romless
• Rom Combinations: Romless
• Ram Combinations: Ramless
• Architecture: 16-bit CISC
• Usb/spi Channels: -
• Uart/sio Channels: 1
• I2c/sio Bus Channels: -
• (s)dram Controller: 1
• Adc 10-bit Channel: -
• Da Converter: -
• Timer 8-bit Channel: 4
• Timer 16-bit Channel: -
• Pwm 8-bit Channels: -
• Pwm 16-bit Channels: -
• Cs/wait Controller: 4
• Dual Clock: Y
• Number Of I/o Ports: 31
• Power Supply Voltage(v): 2.7 to 3.6

3.3.4
3.3.5
ACT1 to ACT0
DFM output: f
Lockup timer
<DLUPFG>
System clock f
Note: Input frequency limitation and correction for DFM
Prescaler Clock Controller
can divide the clock.
divided by 2. The setting of the SYSCR0<PRCK0:1> register determines which clock signal
is input.
divided by 4. The setting of the SYSCR0<PRCK0:1> register determines which clock signal
is input.
Clock Doubler (DFM)
low-frequency oscillator, even though the internal clock is high-frequency.
For the internal I/O (TMRA01 to TMRA23, SIO0 to SIO1, SBI) there is a prescaler which
The φT clock input to the prescaler is either the clock f
The φT0 clock input to the prescaler is either the clock f
DFM outputs the f
A reset initializes DFM to stop status, setting to DFMCR0 register is needed before use.
Like an oscillator, this circuit requires time to stabilize. This is called the lock-up time.
The following example shows how DFM is used.
DFMCR0
DFMCR1
LUP:
X: Don’t care
DFM
SYS
Recommend to use Input frequency (High-speed oscillation) for DFM in the following
condition.
EQU
EQU
LD
LD
BIT
JR
LD
f
f
OSCH
OSCH
Starts DFM operation.
Starts lockup.
= 4 to 6.75 MHz (Vcc = 2.7 to 3.6 V): Write 0BH to DFMCR1
= 2 to 2.5 MHz (Vcc = 2.0 V ± 10%): Write 1BH to DFMCR1
DFM
00E8H
00E9H
5, (DFMCR0)
NZ, LUP
(DFMCR1), 00001011B
(DFMCR0), 01X0XXXXB
(DFMCR0), 10X0XXXXB
clock signal, which is four times as fast as f
Counts up by f
91C016-23
01
OSCH
During lockup
;
;
;
;
;
DFM parameter setting
Set lockup time to 2
Enables DFM operation and starts lockup.
Detects end of lockup
Changes fc from 4 MHz to 16 MHz.
Ends of lockup
FPH
FPH
Changes from 4 MHz to 16 MHz.
divided by 2 or the clock fc/16
divided by 4 or the clock fc/16
After lockup
12
/4 MHz
10
OSCH
. It can use the
TMP91C016
2008-02-20