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PDF GMS90L320Q Data sheet ( Hoja de datos )
| Número de pieza | GMS90L320Q | |
| Descripción | HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS | |
| Fabricantes | Hynix Semiconductor | |
| Logotipo |  |
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HYNIX SEMICONDUCTOR INC.
8-BIT SINGLE-CHIP MICROCONTROLLERS
GMS90C320
User’s Manual (Ver. 1.2)
1 page  
GMS90C320
GMS90C320/L320
CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
ROM-less Version for 90C52
Operating Voltage (V) Device Name
4.25~5.5
2.7~5.5
GMS90C320
GMS90L320
ROM
ROM-less
ROM-less
RAM
256 × 8bit
256 × 8bit
Features
• Fully compatible to standard MCS-51 microcontroller
• Versions for 40/50 MHz operating frequency
• Low voltage version for 24MHz operating frequency
• 256 bytes of on-chip data RAM
• 64K external program memory space
• 64K external data memory space
• Four 8-bit ports
• Three 16-bit Timers/Counters (Timer 2 with up/down counter feature)
• USART
• Six interrupt sources, two priority levels
• Power saving Idle and power down mode
• 2.7Volt low voltage version available
• P-DIP-40, P-LCC-44, P-MQFP-44 package
Operating
Frequency (MHz)
40/50
24
T0
T2
T1
RAM
256 x 8
PORT0
CPU
8-BIT
USART
PORT1
PORT2
ROM-less
PORT3
I/O
I/O
I/O
I/O
The GMS90C320 described in this document is compatible with the standard 80C32 can be used for all present standard
80C32 applications.
OCT. 2000 Ver 1.2
1
5 Page 
GMS90C320
Symbol
P2.0-P2.7
PSEN
RESET
ALE
EA
P0.0-P0.7
VS S
VC C
N.C.
Pin Number
P-LCC-44
P-DIP-40
P-MQFP-
44
24-31 21-28 18-25
32 29 26
10 9
4
33 30 27
35 31 29
43-36 39-32 37-30
22 20 16
44 40 38
1,12,
23,34
-
6,17,
28,39
Input/
Output
Function
I/O Port 2
Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2
pins that have 1s written to them are pulled high by the internal
pull-up resistors and can be used as inputs. As inputs, port 2 pins
that are externally pulled low will source current because of the
pulls-ups (IIL, in the DC characteristics). Port 2 emits the high-
order address byte during fetches from external program memory
and during accesses to external data memory that use 16-bit
addresses (MOVX @DPTR). In this application it uses strong
internal pull-ups when emitting 1s. During accesses to external
data memory that use 8-bit addresses (MOVX @Ri), port 2 emits
the contents of the P2 special function register.
O The Program Store Enable
The read strobe to external program memory when the device is
executing code from the external program memory. PSEN is acti-
vated twice each machine cycle, except that two PSEN activation
are skipped during each access to external data memory. PSEN
is not activated during fetches from internal program memory.
I RESET
A high level on this pin for two machine cycles while the oscillator
is running resets the device. An internal diffused resistor to VSS
permits power-on reset using only an external capacitor to VCC.
O The Address Latch Enable
Output pulse for latching the low byte of the address during an
access to external memory. In normal operation, ALE is emitted
at a constant rate of 1/6 the oscillator frequency, and can be used
for external timing or clocking. Note that one ALE pulse is skipped
during each access to external data memory.
I External Access Enable
EA must be external held low to enable the device to fetch code
from external program memory locations 0000H to FFFFH. If EA is
held high, the device executes from internal program memory
unless the program counter contains an address greater than its
internal memory size.
I/O Port 0
Port 0 is an 8-bit open-drain bidirectional I/O port. Port 0 pins that
have 1s written to them float and can be used as high-impedance
inputs. Port 0 is also the multiplexed low-order address and data
bus during accesses to external program and data memory. In
this application it uses strong internal pull-ups when emitting 1s.
Port 0 also outputs the code bytes during program verification in
the GMS97C5x. External pull-up resistors are required during
program verification.
- Circuit ground potential
- Supply terminal for all operating modes
- No connection
OCT. 2000 Ver 1.2
7
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet GMS90L320Q.PDF ] | |
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