MX27C8111MC-10 MCNIX [Macronix International], MX27C8111MC-10 Datasheet - Page 3

• Manufacturer Part Number: MX27C8111MC-10
• Description: 8M-BIT [1M x8/512K x16] CMOS OTP ROM WITH PAGE MODE
• Manufacturer: MCNIX [Macronix International]

P/N: PM0329
FUNCTIONAL DESCRIPTION
THE PROGRAMMING OF THE MX27C8111
When the MX27C8111 is delivered, the chip has all
8M bits in the "ONE" or HIGH state. "ZEROs" are loaded
into the MX27C8111 through the procedure of
programming.
For programming, the data to be programmed is applied
with 16 bits in parallel to the data pins.
Vcc must be applied simultaneously or before Vpp, and
removed simultaneously or after Vpp.
programming an MXIC One Time Programmable Read
Only Memory, a 0.1uF capacitor is required across Vpp
and ground to suppress spurious voltage transients
which may damage the device.
FAST PROGRAMMING
The device is set up in the fast programming mode when
the programming voltage VPP = 12.75V is applied, with
VCC = 6.25 V and OE = VIH (Algorithm is shown in
Figure 1). The programming is achieved by applying a
single TTL low level 50us pulse to the CE input after
addresses and data line are stable. If the data is not
verified, an additional pulse is applied for a maximum of
25 pulses. This process is repeated while sequencing
through each address of the device.
programming mode is completed, the data in all address
is verified at VCC = VPP = 5V ± 10%.
PROGRAM INHIBIT MODE
Programming of multiple MX27C8111's in parallel with
different data is also easily accomplished by using the
Program Inhibit Mode. Except for CE and OE, all like
inputs of the parallel MX27C8111 may be common. A
TTL low-level program pulse applied to an MX27C8111
CE input with VPP = 12.5 ± 0.5 V will program the
MX27C8111. A high-level CE input inhibits the other
MX27C8111s from being programmed.
PROGRAM VERIFY MODE
Verification should be performed on the programmed
bits to determine that they were correctly programmed.
The verification should be performed with OE at VIL, CE
When the
When
3
at VIH, VPP at its programming voltage.
AUTO IDENTIFY MODE
The auto identify mode allows the reading out of a binary
code from an One Time Programmable Read Only
Memory that will identify its manufacturer and device
type. This mode is intended for use by programming
equipment for the purpose of automatically matching the
device to be programmed with its corresponding
programming algorithm. This mode is functional in the
25° C± 5°C ambient temperature range that is required
when programming the MX27C8111.
To activate this mode, the programming equipment
must force 12.0 ± 0.5 V on address line A9 of the device.
Two identifier bytes may then be sequenced from the
device outputs by toggling address line A0 from VIL to
VIH. All other address lines must be held at VIL during
auto identify mode.
Byte 0 ( A0 = VIL) represents the manufacturer code,
and byte 1 (A0 = VIH), the device identifier code. For the
MX27C8111, these two identifier bytes are given in the
Mode Select Table. All identifiers for manufacturer and
device codes will possess odd parity, with the MSB
(Q15) defined as the parity bit.
READ MODE
The MX27C8111 provides page mode with 8 words/16
bytes per page. In order to get the benefit of fast page
read, the user should keep chip enable(CE) low and
toggle address A0~A2 in word mode or A-1~A2 in byte
mode. Page Read access time(tPA) is equal to the delay
from address stable to data output. It is twice as fast as
normal tACC and is highly recommended.
WORD-WIDE MODE
With BYTE/VPP at VCC ± 0.2V outputs Q0-7 present
data Q0-7 and outputs Q8-15 present data Q8-15, after
CE and OE are appropriately enabled.
BYTE-WIDE MODE
With BYTE/VPP at GND ± 0.2V, outputs Q8-15 are tri-
stated. If Q15/A-1 = VIH, outputs Q0-7 present data bits
MX27C8111
REV. 2.6, AUG. 22, 2001