參數(shù)資料
型號(hào): HT9580
廠商: Holtek Semiconductor Inc.
英文描述: Character Pager Controller
中文描述: 字符傳呼機(jī)控制器
文件頁數(shù): 22/63頁
文件大小: 444K
代理商: HT9580
HT9580
22
April 28, 2000
Preliminary
The SRAM bank point register can switch to ei-
ther external 256 Kbytes or internal 32 Kbytes
SRAMspace.Theselectiontableisbasedonthe
following table. The space size of each SRAM
bank is 8 Kbytes. Bits BP_MODS1 and
BP_MODS0 define whether internal or exter-
nal SRAM devices are used. (BP_MODS1,
BP_MODS0)=(0, 1), is for internal SRAM de-
vices. (BP_MODS1, BP_MODS0)=(1, 0), is for
external SRAM devices. The internal SRAM
would switch from bank 0 to bank 3 and the ex-
ternal SRAM would switch from bank 0 to bank
31 by software programming. In addition, the
address range of the internal/external SRAM
will all range from 3000H to 4FFFH.
SRAM bank point register
Address
Register
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
State on
POR
0016H
SRAM-BP
BP_MODS1 BP_MODS0
S_BP5
S_BP4
S_BP3
S_BP2
S_BP1
S_BP0
0000 0000
BP_MODS1 BP_MODS0
S_BP5
S_BP4
S_BP3
S_BP2
S_BP1
S_BP0
BP Value
Memory Area
0
0
X
X
X
X
X
X
X
Reserved
0
1
0
0
0
0
0
0
0
Internal 32 Kbits SRAM (Low 8 Kbytes)
0
1
0
1
0
0
0
0
1
1
3
Internal 32 Kbits SRAM (High 8 Kbytes)
0
1
0
0
0
1
0
0
4
Reserved
0
1
Reserved
0
1
1
1
1
1
1
1
63
Reserved
1
0
0
0
0
0
0
0
0
External 256 Kbits SRAM (Low 8 Kbytes)
1
0
1
0
0
1
1
1
1
1
31
External256KbitsSRAM(High8Kbytes)
LCD control and data register
Address
Register
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
State on
POR
0017H
LCD_CTRL
LCD-CHIP1
LCD-CHIP0
LCD-CLK
CLK-MOD
LCD-CS1
LCD-CS0
LCD-A0
LCD-WRB
0000 1101
0018H
LCD_CMD
LCD_D7
LCD_D6
LCD_D5
LCD_D4
LCD_D3
LCD_D2
LCD_D1
LCD_D0
uuuu uuuu
The LCD control and command registers are
used for LCD driver interface. There are three
kinds of LCD driver chips available for the
HT9580. These LCD drivers are SED15X(KSX)
series, Motorola LCD driver chip MC141X se-
ries and HD66410 respectively according to the
following LCD-CHIP0 and LCD-CHIP1 bit
table settings. The combination of the
LCD_CMD and LCD-CTRL registers can con-
trol the SED15X(KSX), MC141X series or
HD66410 LCD drivers. Bits LCD-CS0/1 of the
LCD-CTRL register corresponds to the chip se-
lect pin of the LCD driver. The bit LCD-CS0 is
used to control the master LCD driver chip
while LCD-CS1 is for the slave LCD driver
chip. Both bits are active low. The bit
CLK_MOD is used to enable or disable the
pin out of LCD_CL. If the bit is set low, the
clock output of pin LCD_CL will be disabled,
otherwise the LCD_CL clock will be set accord-
ing to the following Truth Table.
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