TMP91xy20AFG Toshiba, TMP91xy20AFG Datasheet - Page 110

• 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

3.7
8-Bit Timers (TMRA)
two channels and can operate in any of the following four operating modes.
In addition, a timer flip-flop and a prescaler are provided for each pair of channels.
registers).
operate in the same manner; hence only the operation of TMRA01 is explained here.
The TMP91C820A features 4 built-in 8-bit timers.
These timers are paired into four modules: TMRA01 and TMRA23. Each module consists of
Figure 3.7.1 and 3.7.2 show block diagrams for TMRA01 and TMRA23.
Each channel consists of an 8-bit up counter, an 8-bit comparator and an 8-bit timer register.
The operation mode and timer flip-flops are controlled by five controls SFRs (Special function
Each of the two modules (TMRA01 and TMRA23) can be operated independently. All modules
The contents of this chapter are as follows.
•
•
•
•
3.7.1
3.7.2
3.7.3
3.7.4
8-bit interval timer mode
16-bit interval timer mode
8-bit programmable square wave pulse generation output mode (PPG: Variable duty
cycle with variable period)
8-bit pulse width modulation output mode (PWM: Variable duty cycle with constant
period)
(1)
(2)
(3)
(4)
(5)
(6)
External
pin
SFR
(Address)
Block Diagrams
Operation of Each Circuit
SFRs
Operation in Each Mode
8-bit timer mode
16-bit timer mode
8-bit PPG (Programmable pulse generation) output mode
8-bit PWM (Pulse width modulation) output mode
Settings for each mode
LCDC and MELODY/ALARM circuit supply mode
Table 3.7.1 Registers and Pins for Each Module
Input pin for external
clock
Output pin for timer
flip-flop
Timer run register
Timer register
Timer mode register
Timer flip-flop control
register
Module
91C820A-108
TA01MOD (0104H)
TA01RUN (0100H)
TA1FFCR (0105H)
(Shared with PB0)
(Shared with PB1)
TA0REG (0102H)
TA1REG (0103H)
TMRA01
TA1OUT
TA0IN
TA23MOD (010CH)
TA23RUN (0108H)
TA3FFCR (010DH)
(Shared with PB5)
TA2REG (010AH)
TA3REG (010BH)
TMRA23
TA3OUT
No
TMP91C820A
2008-02-20