TMP91xy25FG Toshiba, TMP91xy25FG Datasheet - Page 21

• Manufacturer Part Number: TMP91xy25FG
• Manufacturer: Toshiba

Specifications of TMP91xy25FG

• 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: 2
• I2c/sio Bus Channels: -
• (s)dram Controller: -
• Adc 10-bit Channel: 4
• 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: 49
• Power Supply Voltage(v): 3.0 to 3.6

3.3.3
Warm-up Time
<WUPTM1:0>
10 (2
11 (2
01 (2
SYSCR2
14
16
8
System Clock Controller
internal I/O. It contains two oscillation circuits and a clock gear circuit for high-frequency
(fc) operation. The register SYSCR1<SYSCK> changes the system clock to either fc or fs,
SYSCR0<XEN> and SYSCR0<XTEN> control enabling and disabling of each oscillator,
and SYSCR1<GEAR0:2> sets the high-frequency clock gear to either 1, 2, 4, 8 or 16 (fc, fc/2,
fc/4, fc/8 or fc/16). These functions can reduce the power consumption of the equipment in
which the device is installed.
100 will cause the system clock (f
and X2 pins.
(1) Switching from NORMAL mode to SLOW mode
Note 1: When using an oscillator (other than a resonator) with stable oscillation, a warm-up
Note 2: The warm-up timer is operated by an oscillation clock. Hence, there may be some
/frequency)
/frequency)
/frequency)
The system clock controller generates the system clock signal (f
The combination of settings <XEN> = 1, <XTEN> = 0, <SYSCK> = 0 and <GEAR0:2> =
For example, f
the warm-up timer can be used to change the operation frequency after stable
oscillation has been attained.
examples 1 and 2.
When the resonator is connected to the X1 and X2 pins, or to the XT1 and XT2 pins,
The warm-up time can be selected using SYSCR2<WUPTM0:1>.
This warm-up timer can be programmed to start and stop as shown in the following
Table 3.3.1 shows the warm-up time.
timer is not needed.
variation in warm-up time.
Table 3.3.1 Warm-up Times
SYS
is set to 1.1 MHz when the 36 MHz oscillator is connected to the X1
NORMAL Mode
Change to
0.455 (ms)
1.820 (ms)
7.1 (μs)
91C025-19
SYS
) to be set to fc/32 (fc/16 × 1/2) after a reset.
SLOW Mode
Change to
2000 (ms)
500 (ms)
7.8 (ms)
SYS
) for the CPU core and
at f
OSCH
fs = 32.768 kHz
TMP91C025
= 36 MHz,
2007-02-28