TMP91xy20AFG Toshiba, TMP91xy20AFG Datasheet - Page 22

• Manufacturer Part Number: TMP91xy20AFG
• Manufacturer: Toshiba

Specifications of TMP91xy20AFG

• Package: LQFP144
• Rom Types(m=mask,p=otp, F=flash,e=eeprom): M
• Rom Combinations: 8
• Ram Combinations: 8
• Architecture: 16-bit CISC
• Usb/spi Channels: -
• Uart/sio Channels: 1
• I2c/sio Bus Channels: 1
• (s)dram Controller: 1
• Adc 10-bit Channel: 8
• Da Converter: -
• Timer 8-bit Channel: 4
• Timer 16-bit Channel: 1
• Pwm 8-bit Channels: -
• Pwm 16-bit Channels: -
• Cs/wait Controller: 4
• Dual Clock: Y
• Number Of I/o Ports: 77
• Power Supply Voltage(v): 3.0 to 3.6

3.3.3
01 (2
10 (2
11 (2
Warm-up Time
<WUPTM1:0>
8
14
16
/frequency)
SYSCR2
/frequency)
/frequency)
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
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.
Note 1: When using an oscillator (Other than a resonator) with stable oscillation, a
Note 2: The warm-up timer is operated by an oscillation clock. Hence, there may be some
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 times.
warm-up timer is not needed.
variation in warm-up time.
SYS
NORMAL Mode
is set to 1.1 MHz when the 36-MHz oscillator is connected to the X1
Change to
7.1
0.455 [ms]
1.820 [ms]
Table 3.3.1 Warm-up Times
[µs]
91C820A-20
SYS
) to be set to fc/32 (fc/16 × 1/2) after a reset.
SLOW Mode
Change to
2000
500
7.8
[ms]
[ms]
[ms]
SYS
) for the CPU core and
at f
fs = 32.768 kHz
OSCH
TMP91C820A
= 36 MHz,
2008-02-20