TMP91xy20AFG Toshiba, TMP91xy20AFG Datasheet - Page 288

• 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

SRS2
0
0
0
0
1
1
1
1
<SRS2:0> setting
(2) Refresh control
SRS1
intervals specified by SDRCR<SRS2:0>. The Auto Refresh interval can be specified in
a range of 78 states to the 312 states (4.3 µs to 17.3 µs at 36 MHz).
SDRAM area (CS1) after the interval setup by <SRS2:0>.
shown in Table 3.16.2.
LCDC.
When it returns to CPU access cycle, an interval refresh cycle is generated.
refresh cycle is shown in Figure 3.16.9.
0
0
1
1
0
0
1
1
The TMP91C820A supports Auto Refresh cycle.
When SDRCT<SRC> is set to “1”, the Auto Refresh cycle is automatically generate at
The generating timing of a refresh cycle becomes into access cycles other than
The refresh cycle is shown in Figure 3.16.8. Moreover, the refreshment interval is
It does not generate interval refreshment during the burst access to SDRAM by
The interval refreshment demand generated in the meantime is held only once.
Furthermore, TMP91C820A can generate a self refresh cycle. The timing of a self
SRS0
Table 3.16.2 Auto Refresh Cycle Insertion Interval
0
1
0
1
0
1
0
1
SDUDQM
SDLDQM
SDRAS
SDCAS
SDCKE
SDWE
SDCLK
Insertion
SDCS
interval
(State)
124
156
195
210
247
312
78
97
Figure 3.16.8 Refresh Cycle
91C820A-286
5 MHz
15.6
19.4
24.8
31.2
39.0
42.0
49.4
62.4
Auto refresh
2 states
6.25 MHz
12.5
15.5
19.8
25.0
31.2
33.6
39.5
49.9
8 MHz
12.1
15.5
19.5
24.4
26.3
30.9
39.0
Frequency (f
9.8
10 MHz
12.4
15.6
19.5
21.0
24.7
31.2
SYS
7.8
9.7
)
12.5 MHz
12.5
15.6
16.8
19.8
25.0
6.2
7.8
9.9
TMP91C820A
(Unit: µs)
18MHz
10.8
13.7
17.3
11.7
2008-02-20
4.3
5.4
6.9
8.7