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參數資料
| 型號： | 8XC51SL |
| 廠商： | Intel Corp. |
| 英文描述： | Low Voltage Keyboard Controller(低電壓鍵盤控制器) |
| 中文描述： | 低壓控制鍵盤（低電壓鍵盤控制器） |
| 文件頁數： | 5/23頁 |
| 文件大?。?/td> | 256K |
| 代理商： | 8XC51SL |
8XC51SL/LOW VOLTAGE 8XC51SL
PIN DESCRIPTIONS
(Continued)
Table 1. Pin Descriptions
(Continued)
Symbol
Type
Description
XTAL1
I
Input to the on-chip oscillator.
XTAL2
O
Output from the on-chip oscillator.
AVGND
Analog ground potential.
AVREF
Analog supply voltage; nominally
a
5V
g
10% for 8XC51SL,
a
3.3V
g
0.3V for Low
Voltage 8XC51SL.
AIN0–3
I
A/D Analog input channels.
ADB0–7
I/O
External address/data bus. Multiplexes the low-address byte and data during external
memory accesses.
EAL/V
PP
I
External address input. When held high, the 51SL CPU executes out of internal Program
Memory unless the program counter exceeds 3FFFH. When held low, the 51SL CPU
always executes out of external memory. EAL is latched on the falling edge of RST. This
pin also receives the programming supply voltage (V
PP
) during EPROM programming.
ALE
O
Address Latch Enable output pulse latches the low address byte during external
memory access. ALE is output at a constant rate of
(/6
the oscillator frequency, whether
or not there are accesses to external memory. One ALE pulse is skipped during the
execution of a MOVX instruction. ALE is disabled during Idle mode and can also be
disabled via Configuration register 1 control.
PSENL
O
Program Store Enable is the read strobe to external program memory. PSENL is
qualified with RDL and A15 for use with an external Flash memory. PSENL is not active
when the device executes out of internal program memory.
MEMCSL
I/O
External Memory Chip Select for code space address 4000H and above, when EAL is
inactive (i.e., high). For EAL low, MEMCSL is active. Goes inactive during Idle mode and
Power-Down mode. If external memory interfacing is not required, MEMCSL can be
configured as a general purpose I/O (controlled via Configuration register 1).
RST
I
Resets the keyboard controller. Hold RST high for two machine cycles.
5
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相關代理商/技術參數 |
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| 8XC51SL.LOWVOLTAGE8XC51SL | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:KEYBOARD CONTROLLER |
| 8XC51SL/LOWVOLTAGE8XC51SL | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:8XC51SL. LOW VOLTAGE 8XC51SL - KEYBOARD CONTROLLER |
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